Knowledge Base

Aac File format .aac AAC is the lossy audio compression that followed MP3 and now carries most streamed music and video sound. A bare AAC file holds audio frames and little else. Active D Lighting Dictionary active-d-lighting When checking the metadata of a photo, you will find much information about different camera settings. One of them is Active D-Lighting. Check out what it means and what it says about your photo. Album Dictionary album Album information can be found in many files when you check meta information. But what does it really say about your file? Check it out. Aperture Dictionary aperture Aperture is a value found in photos. It is linked to a specific camera setting that was used to take the photo. Find out more about Aperture information in your file. Archived File Name Dictionary archived-file-name One kind of metadata information you can find in archive and other compressed files is the Archived File Name. Check out what this means. Artist Dictionary artist Artist is a meta information you can find in audio files on one hand, but also in image files. Here, you can get more information about what this tells you about the Artist of your file. Asin Dictionary asin ASIN is information often found in e-book files. Read more about what ASIN is and what it means for your file when you find it after checking your e-book for hidden data. Attached Pic Dictionary attached-pic When you check your file for secret data, there is a chance that there is information about an Attached Pic in it. Check out what this means for your picture, photo, video, document, e-book or even audio file. Audio Bitrate Dictionary audio-bitrate In audio files, such as MP3 or WAV, you will find metadata indicating the Bit Rate. Likewise, you find it in video files that contain audio data. Find out what Bit Rate is. Audio Layer Dictionary audio-layer Checking the hidden meta information of a video or audio file might give you information about the Audio Layer. Read more to find out what Audio Layer is and what it says about your file. Author Dictionary author Author information is something you can find out by checking your file's metadata. Find out what it says about your e-book, document, or other file. Auto Focus Dictionary auto-focus Auto Focus is a particular camera setting. Information about it can be found when checking the EXIF information of a photo or image file. Check out what Auto Focus is. Avi File format .avi AVI is Microsoft's early video container from the Windows 3.1 era. You still meet it in old camcorder footage, archived clips and downloads made years ago. Azw3 File format .azw3 AZW3 holds Amazon's Kindle Format 8, the container a modern Kindle book is packed in and the file you get when you convert an ebook for Kindle hardware.

B Frames Dictionary b-frames If you check your videos for hidden information, you may find a piece of information called Has B Frames. What does that mean? Read more to find out. Background Color Dictionary background-color You can find information about the Background Color of an image file if you check the metadata of the picture or photo. Find out more about Background Color here. Band Dictionary band Infomation about the recording Band is often found in the metadata of an audio file. Here, we provide more information about this kind of meta information. Bit Depth Dictionary bit-depth Bit Depth, also called color depth, is meta information you find in image and video files. Find out what it says about the colors and the quality of your file. Bit Flag Dictionary bit-flag Bit Flag, also known as a bit field, is metadata you can find in several kinds of files. Find out what it means, where it comes from and what it says about your file. Bit Rate Dictionary bit-rate In audio files, such as MP3 or WAV, you will find metadata indicating the Bit Rate. Likewise, you find it in video files that contain audio data. Find out what Bit Rate is. Bmp File format .bmp BMP is Microsoft's plain bitmap format, storing pixels almost exactly as they appear on screen with no compression, which makes the files very simple and very large. Book Name Dictionary book-name When you check the metadata of an e-book file, you may come across information about the Book Name. Find out what this value is, where it comes from and why it matters. Byte Order Dictionary byte-order The Byte Order is one of the hidden details you find in a file when you check its metadata. Find out what it means and what it tells you about how your file was written.

Camera Make Dictionary camera-make Camera Make is the exif information that names the maker of the camera a photo or video was shot with. Find out what this value looks like and what it tells you. Camera Model Dictionary camera-model Images, raw camera photos and video files can carry exif information called Camera Model. Find out what this value is, what it looks like and why it is worth a look. Category Dictionary category The Category is a very broad piece of metadata you can find in a multitude of files. Check out what it means and what differentiates it from File Type and File Type Extension. Cbz File format .cbz A CBZ file is a comic book, graphic novel or manga volume stored as a ZIP archive of page images, which is how most scanned comics are passed around and read. Channel Layout Dictionary channel-layout When dealing with video or audio files, you might have come across metadata called Channel Layout. Find out what this is and what it tells you about your audio or video file. Channels Dictionary channels Wondering what the number of Audio Channels says about your file? Find out what a channel is and what the count tells you about your music, recording or video file. Character Count With Spaces Dictionary character-count-with-spaces The Character Count is important information about your document or even e-book file, and you can easily find it out by checking the metadata of a file. But what does Character Count With Spaces mean? Characters Dictionary characters Characters is a rather generic piece of metadata. Find out what it means precisely and in which kinds of files you are likely to find this kind of meta information. Chroma Subsampling Dictionary chroma-subsampling Chroma Subsampling can be found in different kinds of video and image files. Find out what this way of reducing color information means for the quality of your file. Codec Long Name Dictionary codec-long-name What does it mean when a file contains a Codec Long Name? Find out where this metadata value comes from and what it tells you about your audio or video file. Codec Tag Dictionary codec-tag You may know what a codec is, but what about the Codec Tag? Find out how to read the Codec Tag of a video and how to get from it to the actual codec that was used. Codec Type Dictionary codec-type Certain files can be encoded using a so-called codec. Next to other information, the Codec Type can be interesting when looking at audio or video encoding. Read more about Codec Type. Coded Height Dictionary coded-height What is the Coded Height of a file? This meta information can be found in many different files; image and video, document and e-book, and even audio. Find out what it says about your file. Coded Width Dictionary coded-width A file can only have so many values about it’s width. One of them is the so-called Coded Width. Find out what this means about your file and how it differs with respect to other width values. Color Components Dictionary color-components When checking the exif data of a photo or image you can come across information like Color Components. Find out what it means and what it says about the colors in your file. Color Space Dictionary color-space Color Space is information you find when checking image or video files for hidden metadata. What it says about your file, and what you can do with it, is listed here. Comment Dictionary comment We all know what a Comment is, but what does it mean with regard to your file’s metadata? Find out by reading more about the values and variations of comments hidden inside your files. Compression Dictionary compression Compression can be found in many different files. Yet, it states the same about many file types. Find out what Compression is and what it does to different files. Cr2 File format .cr2 CR2 is the raw photo format written by many Canon EOS cameras. It keeps the sensor's unprocessed reading, plus a Canon MakerNote full of camera-specific detail. Create Date Dictionary create-date When checking the information given in a file, you will often find something called the Create Date. Find out all you need to know about this value and what it tells you about your file. Creator Dictionary creator Many files of different formats contain information about the file’s Creator. Read more to find out what or who exactly the creator of a file is. Cropped Image Height Dictionary cropped-image-height The Cropped Image Height is different from the original or regular image height. Check out these information on what this meta-information tells you about your picture, photo or image. Cropped Image Width Dictionary cropped-image-width No, Cropped Image Width is not the same as image width. To find out more, check out the information we have gathered around this special metadata key. Current Iptc Digest Dictionary current-iptc-digest Many image files such as CR2, JPG, EPS oder DNG can contain something that’s called the Current IPTC Digest. But what does that mean? Find out by reading more about IPTC and images.

Date Time Original Dictionary date-time-original Different kinds of date and time information can be found in your file. This article will deal with the so-called Date/Time Original meta information. Find out what it means. Dng File format .dng DNG is Adobe's open raw photo format: the camera sensor's own reading, documented so any program can develop it, with edits and metadata stored inside the file. Doc File format .doc DOC is the binary format Word wrote for two decades before DOCX. Old files still turn up constantly, and they hide more metadata than their authors ever realised. Docx File format .docx DOCX is the format Microsoft Word has written since 2007. It is a ZIP archive of XML files, and it quietly records who worked on the document and for how long. Dub Dictionary dub Did you find a value for Dub in your file? Then read on to find out what this may stand for and what it can tell you about your file. Dub metadata information and more. Duration Dictionary duration Duration is a metadata value that can often be found in audio or video files. Find out what this information is exactly.

Encoding Process Dictionary encoding-process What is an encoding process and why can I find information about it in my video or image file? Find the information you need in this concise explanation. Eps File format .eps EPS is the print industry's old vector exchange format. It is a PostScript program with a header, and that header is where its metadata lives. Epub File format .epub EPUB is the open ebook standard behind almost every bookshop, library and reading app outside Amazon, and it is the format most books arrive in when they are not Kindle files. Exif Version Dictionary exif-version You wonder what the value of EXIF Version in your image or other file means? Then you came to the right place. Information about the EXIF Version and what the values mean can be found here. Exposure Mode Dictionary exposure-mode Photographers are familiar with the Exposure Modes of their cameras, but you can find information about them in the photos and thus in the image files as well. Read more to find out what the Exposure Mode is.

File Modification Date Time Dictionary file-modification-date-time What does it mean when you find a Modification Time or Date in your file's metadata? Find the answer and information about the format they are displayed here. File Name Dictionary file-name Read more to get all information you need about the File Name and its importance when it comes to all kinds of files. File Size Dictionary file-size When checking the hidden meta information of your file, you will get information about the Size of your file. Check out what else the File Size can tell you. File Type Dictionary file-type The File Type is common information about any file you own and especially important when you have an unknown file. Find out what the File Type says about your file. File Type Extension Dictionary file-type-extension The File Type Extension differs from what we know as File Type. Find out what the differences are and what the File Type Extension says about your file. Flac File format .flac FLAC shrinks audio without changing a single sample, so it decodes back to the exact original. You meet it in CD archives and high-quality music downloads. Flash Dictionary flash The exif metadata of images can contain information about the Flash used when taking a photo. This ranges from whether it was on or not to which Flash mode was used. Find out more. Flashpix Version Dictionary flashpix-version You wanted to find out, what kind of data is hidden in your image file and while checking, you stumbled upon something called the FlashPix Version. If this is you, read more to find out what this means for your image. Flv File format .flv FLV is the Flash Video format that carried web video for a decade. Flash Player is gone, so today FLV files are archive material waiting to be converted. Focal Length Dictionary focal-length Focal Length plays a big role in taking photos, especially with DSLR cameras. Thus, you can find this information in many different image files. Find out what the Focal Length means and does. Format Name Dictionary format-name You stumbled upon the Format Name in your file’s hidden data and now you wonder what it means? Read further to get all information you need to understand what the Format Name is. Frame Rate Dictionary frame-rate Frame Rate is something you come across when dealing with video files, movies and video games. But what does it actually mean? Read more to find out what Frame Rate means and what it does when you watch a video or movie.

Gif File format .gif GIF is an old lossless image format limited to 256 colours per frame, and still the simplest way to store a short silent animation that plays anywhere an image can.

Hearing Impaired Dictionary hearing-impaired Some video and audio files may give you information about Hearing Impaired when checking them for hidden metadata. Check out what this means. Heic File format .heic HEIC is the compact photo format iPhones save by default. One file can hold the picture, a depth map, previews and edits, along with full camera and GPS metadata. Height Dictionary height All kinds of files may and can have a value for the file’s Height. How is this possible and what does this say about your file? Find out here.

Image Height Dictionary image-height The Image Height says a lot about the dimension of your image. Check out what exactly it determines and what the values for Image Height tell you about your picture or photograph. Image Size Dictionary image-size Image Size differs from file size when checking the hidden meta information of a picture, photo or another image file. Find out what this meta key can tell you about your file. Image Width Dictionary image-width You can learn more about the dimension of your image when checking the Image Width. Find out what this metadata says about your picture, photo or image and which values it can have. Iso Dictionary iso In digital photography and filmmaking, the ISO plays a big role. Together with aperture and shutter speed, it’s responsible for the exposure of an image, as well as it’s quality. Find out more here.

Jfif Version Dictionary jfif-version Certain JPG images can contain information about the JFIF Version of the file. Check out the information collected here to find out what that says about your file. Jpg File format .jpg JPG is the compressed image format that almost every camera, phone and website uses for photographs. You meet it whenever you take, download or attach a picture.

Karaoke Dictionary karaoke Are you wondering why information about Karaoke popped up in your file when checking the metadata? Don’t worry, we got the information you need to understand why this is happening.

Language Dictionary language Metadata gives us many different information about our files. One of them is Language. Find out where the Language metadata can be found and how it’s defined. Lyrics Dictionary lyrics Why is there Lyrics information in my file? If you checked your file for hidden metadata, it is possible that you found a value called Lyrics. Check out what this means for your file.

M4A File format .m4a An M4A file is audio inside an MP4 container, usually AAC but sometimes lossless ALAC. You meet it in bought music, voice memos and audiobook downloads. Megapixels Dictionary megapixels You surely came across the term Megapixels when buying a new camera or even when buying a smartphone. This information is stored in images as well and we can tell you all you need to know. Mime Type Dictionary mime-type When you check your file for hidden meta information, you may come across something called MIME Type. Read more about what this means about your file. Mkv File format .mkv MKV is the Matroska container, an open format that can hold any number of video, audio and subtitle tracks plus chapters and attachments in a single file. Mobi File format .mobi MOBI is the Mobipocket ebook format that Amazon built the first Kindle on, so you meet it in older ebook collections and in files that were converted years ago. Mov File format .mov MOV is Apple's QuickTime movie format and the way iPhones save video. It is the container MP4 was built from, and it carries unusually detailed camera metadata. Mp3 File format .mp3 MP3 is the lossy audio format that put music on the internet. You meet it in music downloads, podcasts, voice recordings and on almost every player ever built. Mp4 File format .mp4 MP4 is the container almost every video arrives in today, from phone recordings to streaming downloads. It wraps video, audio, subtitles and metadata in one file.

Nb Frames Dictionary nb-frames NB Frames is meta information that you can find in video files and audio files alike. If you want to know what it says about your files, read more. Nb Streams Dictionary nb-streams Checking the metadata of your files, it’s possible that you stumbled upon information called NB Streams. Read more to find out what it means and what it says about your file.

Odt File format .odt ODT is the open standard text document used by LibreOffice and OpenOffice. Like DOCX it is a ZIP of XML, and it records editing statistics in the same quiet way. Ogg File format .ogg An OGG file is an open, royalty-free container that normally holds Vorbis audio. You meet it in open-source software, game soundtracks and sound archives. Operating System Dictionary operating-system Operating Systems are used on every computer or mobile device like tablets and smartphones. But what is it exactly? Find out what is meant when we speak of Operating Systems. Orientation Dictionary orientation Orientation with regard to files is most often found in files that contain image data, such as videos, images or documents. What it says about those images can be looked up here.

Page Rotation Dictionary page-rotation What is Page Rotation and what does it say about my PDF file? Find out what the numbers mean you find when checking the metadata of your PDF document. Page Size Dictionary page-size Documents often contain meta information about the Page Size. But what do these numbers or sometimes terms mean that you find there? We can tell you what the paper or Page Size of a document means and how it can help you. Pages Dictionary pages Read more about files that can contain metadata called Pages. Where can you find them and what does it say about your file? Find out. Pdf File format .pdf PDF is the format that makes a document look the same everywhere. It carries pages, fonts, images and a surprising amount of information about who made it and with what. Pdf Version Dictionary pdf-version Why would it be important what PDF Version your document has? To answer that, you first have to understand wht the PDF Version is. Read more to get answers and information for both. Pixel Format Dictionary pixel-format Both video and image files can contain a value called the Pixel Format. What it says about your file and which information you can get from it can be found here. Png File format .png PNG is a lossless image format with real transparency, created as a free replacement for GIF. It is what screenshots, logos and exported charts are usually saved as. Preview Image Height Dictionary preview-image-height There are special cases of Image Height you can find when checking your file for meta-information. One of them is the Preview Image Height. Read all about what this means. Preview Image Size Dictionary preview-image-size What does it mean when an image has a value for Preview Image Size? We can help you out with this question. Check out the information we have on Preview Image Size. Preview Image Width Dictionary preview-image-width When checking the metadata of a file, you might find a value for the Preview Image Width. Here, you can find all information you could possibly need about this. Preview Time Dictionary preview-time Preview Time can mainly be found in video files, however, some other files such as the Audible AAX file can show Preview Time as well. If you want to know what it means, read more. Probe Score Dictionary probe-score The Probe Score is a hidden meta information that you may not be familiar with. Find out what it says about your file, it's format and what a program called FFmpeg has to do with it.

Raw Header Dictionary raw-header Checking the metadata information of a file might give you a value for the so-called Raw Header. Find out what a Raw Header is and what it says about your file. Resolution Unit Dictionary resolution-unit Resolution Unit tells you whether the resolution figures in your file are counted per inch or per centimetre. Here is what that means for your image and for printing. Rtf File format .rtf RTF stores formatted text as readable markup rather than binary data. It is the old lowest common denominator between word processors, and it still works everywhere.

Sample Fmt Dictionary sample-fmt In audio and video files, and sometimes in other formats, you may find a value for Sample Format or sample_fmt. Find out what it is and what it tells you about your file. Sampling Rate Dictionary sampling-rate The Sampling Rate is a value you will mostly find in audio and video files. It decides how much of the original sound a recording could keep. Here is what your value means. Scene Capture Type Dictionary scene-capture-type Photos shot with specific cameras may carry exif data labeled as the Scene Capture Type. Find out what this means and what it says about the photo. Shutter Speed Dictionary shutter-speed When taking photos, you have surely heard of Shutter Speed. It is the length of the exposure, and it decides how sharp or how blurred a picture turns out. Here is what your value means. Software Dictionary software Software is a field found in all kinds of files: audio, video, document, image, e-book, data and more. What it says about your file in particular can be read up here. Start Time Dictionary start-time What does it mean when your file carries a field called Start Time? Read on to find out what it stands for, and why the value for Start Time can even turn out to be negative. Svg File format .svg SVG describes a picture as shapes and text rather than pixels, so it stays sharp at any size. It is XML, which means you can read it and it can carry a lot of metadata.

Tagged Dictionary tagged Files can contain tags, and images in particular often carry a field saying whether the file is Tagged or not. Find out what this means and where the tags themselves are kept. Tagged Pdf Dictionary tagged-pdf PDF documents can contain information about whether they are actually Tagged PDF files or not. Check out what this says about the information hidden in your PDF files. Thumbnail Image Dictionary thumbnail-image Thumbnail Image metadata can be found in many different kinds of files. If you want to know what it is and what the value says about your file in particular, read more. Tiff File format .tiff TIFF is a flexible tag-based image format built for scanning, printing and archiving. It can hold many pages, deep colour and more metadata than any other image type. Time Base Dictionary time-base If you found a value for Time Base in your file, you surely want to know what it means. Find out information we gathered around the Time Base metadata. Title Dictionary title A Title is, typically, a name that was given to any kind of creative work. But what does it mean when you find it in the metadata of your file? Find out by reading more about the metadata tag Title. Track Volume Dictionary track-volume Track Volume differs from the actual volume of a video or audio file. But what’s the difference and what does it say about your file? Find out. Txt File format .txt TXT is text and nothing else. It has no formatting and no metadata of its own, which is exactly why it is the most durable document format there is.

Uncompressed Size Dictionary uncompressed-size Uncompressed Size is a value you will often find in ZIP files or other archives. Find out what is meant by that and what it tells you about your file. Userproperties Dictionary userproperties What are Userproperties, and why does this information turn up in your PDF document? Read on to find out what this metadata tells you about your PDF file.

Visual Impaired Dictionary visual-impaired Many different files can contain information for the Visual Impaired. Check out what it means when your document, image or video file contains such metadata.

Wav File format .wav WAV stores sound uncompressed, exactly as it was recorded. You meet it in recording and editing work, in broadcast and film audio, and in system sounds. Webm File format .webm WebM is the royalty-free video format Google built for the web. It is what browsers stream, what screen recorders in a browser save, and it carries almost no metadata. Webp File format .webp WebP is Google's web image format with both lossy and lossless modes, transparency and animation, meant to replace JPG, PNG and animated GIF with smaller files. White Balance Dictionary white-balance If you are familiar with photography and filming, you have surely heard of White Balance before. If not, find out what it says about different image and video files. Width Dictionary width Almost every file has a value specified for its Width. Check out what this means and what it can tell you about your file, whether that is a document, an image, a video or an audio file. Wmv File format .wmv WMV is Microsoft's Windows Media Video format, stored in an ASF container. You meet it in older Windows recordings, corporate footage and downloads from the 2000s.

X Resolution Dictionary x-resolution Images, videos and scanned documents can all carry a metadata field called X Resolution. Read on to find out what the X Resolution refers to and what its value means. Xlsx File format .xlsx XLSX is the spreadsheet Excel has written since 2007. It is a ZIP of XML parts, and it remembers authors, editing time and often data you thought you had removed. Xmp Toolkit Dictionary xmp-toolkit Don’t be confused when you find metadata labeled XMP Toolkit while examining a file. Here is what you need to know about the XMP Toolkit and what it means for your file.

Y Resolution Dictionary y-resolution Images, videos and other files may show a metadata field called Y Resolution. If you want to find out what this number means for your own file, then read on.

Zip Compressed Size Dictionary zip-compressed-size When checking the hidden meta information of an archive file, e.g. ZIP or RAR, you will come across the Compressed Size of said file. Find out what that means. Zip Crc Dictionary zip-crc CRC, or ZIP CRC, is a metadata value you will often find in archive files. Read more on what CRC stands for and what the value tells you about your own file. Zip Uncompressed Size Dictionary zip-uncompressed-size Uncompressed Size is a value you will often find in ZIP files or other archives. Find out what is meant by that and what it tells you about your file.