Compare Videos Online

Easily compare video quality and differences

100% Free No installation required Secure & private

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Free and easy-to-use video comparison tool

What the app measures, before you upload anything.

12 quality metrics in the report, VMAF among them

4 figures per metric: harmonic mean, mean, max, and min

9 video formats accepted, from MP4 to MKV

2 videos per comparison: a reference and the one you check

Objective video quality comparison with VMAF

The Compare Videos tool by Metadata2Go helps you detect differences between two videos by analyzing their quality frame by frame. It uses a machine learning-based video quality algorithm designed to closely predict how viewers perceive video quality.

By uploading two videos, our tool calculates a VMAF score for each video, giving you a clear comparison of their overall quality. It breaks down the quality of every frame, highlighting where quality differences appear. In addition, the tool provides detailed metrics for each frame and summary statistics for the entire video, helping you understand the extent of any visual changes.

VMAF stands for Video Multimethod Assessment Fusion. The report shows up to 12 metrics in all, VMAF plus the ADM, motion, and VIF measures behind it, and each one is pooled 4 ways: harmonic mean, mean, max, and min.

Numbers replace opinions. Two people can disagree about which video looks better; the metrics do not.

Side by side video comparison, frame by frame

This app analyses the two videos instead of playing them next to each other. There is no video player and no scrub bar. What comes back is the evidence: a table that puts both files in adjacent columns, and a gallery of difference images.

The File Details table lines up 7 properties for each video, so a mismatch in dimensions, duration, or codec is visible in one glance rather than after two rounds of checking file info by hand.

The Frame Comparison gallery shows where the two videos stop matching. Each image marks the difference at that point in the timeline, which is what a quality drop, a re-encode artefact, or an edited shot looks like on screen.

One video comparison report, exported as a PDF

Everything the comparison finds lands in one report: the file details, the quality metrics, and the frame differences, in that order. Export PDF turns the whole thing into a single file with a page footer that names where it came from.

That matters when the comparison is evidence for somebody else. A colleague reviewing an encode, a client signing off a delivery, or a case file six months from now all need a document rather than a browser tab.

The report stays with the comparison in your workspace, so reloading the page does not throw the result away.

Compare video files in the browser, with nothing to install

The comparison runs on our servers and the result opens in your browser. There is no binary to download, no package to compile, and no command line to learn, which is what most of the alternatives ask for before they show you anything.

Each of the 2 videos can come from wherever it already is: your device, a direct link, Google Drive, Dropbox, or OneDrive. A file already open in your workspace can be dropped into either slot with one click.

Comparing videos is free and needs no account. Each video can be up to 75 MB, and a paid plan raises that to 8 GB.

Accepted formats: MP4, WebM, OGG, MOV, MKV, AVI, FLV, WMV, and M4V.

What the video comparison report contains

Three sections and an export. This is everything the app hands back after it compares the 2 videos.

Report section	What it shows	Where it comes from
File Details	7 properties, both videos	The 2 uploaded files
Quality Metrics	Up to 12 metrics, 4 figures each	The frame analysis
Frame Comparison	Difference images, frame by frame	The frame analysis
PDF export	The whole report in one file	Built in your browser

The 7 file properties are name, size, dimensions, duration, file type, video codec, and audio codec. Every metric is pooled 4 ways: harmonic mean, mean, max, and min, to 4 decimal places. A metric the analysis does not return is left out of the table rather than shown as zero.

When to compare two videos

The Compare Videos tool is ideal for forensic analysis, post-production quality checks, or comparing video versions. With no need for specialized software, you can access these insights online from anywhere.

Post-production quality checks

Before a delivery goes out, compare the export against the graded master. The metrics say whether the render held up, and the frame images say exactly where it did not.

Encoding and compression checks

A smaller file always costs something. Compare the re-encoded video with the source and you can see what the saving cost, instead of guessing at a bitrate.

Forensic and archive verification

Two copies of the same recording should be identical. When they are not, the report shows which frames differ and hands you a PDF you can attach to the case.

Your videos stay yours

The footage you compare can be unreleased, confidential, or evidence. Here is exactly how it is handled.

No human access

Nobody reads, watches, or copies the videos you upload. The comparison is fully automated. The download link is generated at random and cannot be guessed.

Never used to train AI

Your videos are not used to train AI models. You keep the copyright and the ownership of both files you upload and of the comparison report you get back.

GDPR compliant

The servers that do the work are located in Europe, under a data processing agreement you can download. Only what the comparison needs is processed.

How to compare videos

Upload the two videos you want to compare.

Upload

Add the first video. This is the reference the second one is measured against.
Compare

Add the second video and start the comparison. Both files are analysed frame by frame.
Download

Open the report to read the metrics and the frame differences, then export it as a PDF.

Compare video FAQ

How do I compare two videos?

Upload the first video, which is the reference, then add the second one and start the comparison. The app analyses both files frame by frame and returns a report with the file details, the quality metrics, and the frames where the two videos differ.

How can I tell which of two video files has the better quality?

Read the VMAF row in the Quality Metrics table. VMAF is built to predict how a viewer would rate the picture, so a higher score means the video looks closer to the reference. The other 11 metrics say how similar the two files are on detail, motion, and contrast.

What app can I use to compare videos?

This one runs in the browser, so there is nothing to install and no command line to learn. Most alternatives are desktop programs that have to be downloaded or compiled first. Upload 2 videos here and the comparison report opens in the same tab.

Which video formats can I compare?

MP4, WebM, OGG, MOV, MKV, AVI, FLV, WMV, and M4V. The 2 videos do not have to share a format, so an MP4 can be compared against a MOV of the same footage.

What is a VMAF score?

VMAF stands for Video Multimethod Assessment Fusion. It is a machine learning-based metric that fuses several image measures into one number designed to track how people actually judge video quality. The report shows it alongside the ADM, motion, and VIF measures it is built from.

Can I compare more than two videos at once?

No. A comparison takes exactly 2 videos, a reference and the one you check against it. To compare a third file, run a second comparison against the same reference.

Is it free to compare videos online?

Yes. Comparing videos is free and no account is needed. Each video can be up to 75 MB on the free tier, and a paid plan raises that to 8 GB.

Are the videos I compare kept private?

Yes. Nobody reads, watches, or copies your files, because the comparison is fully automated. Your videos are never used to train AI models, the servers are located in Europe, and you keep the copyright and the ownership of everything you upload.