WebM to GIF Converter

Turn a WebM screen recording or clip into a looping animated GIF — free, entirely on your device.

How WebM-to-GIF conversion works

WebM is the format most browsers save screen recordings in. This tool loads a real video encoder compiled to WebAssembly right in your tab, decodes the WebM, samples frames at the rate you set, scales them to your target width, and writes out a looping GIF — no upload required.

This is the fastest way to turn a quick bug-report screen recording into a GIF that plays inline in a chat message or ticket comment.

Good settings for screen recordings

Screen recordings are usually the primary source for WebM files, and they behave a little differently from filmed video — cursor movement and UI transitions read fine at a lower frame rate than motion footage does, so 8-10fps is often plenty even for demonstrating a multi-step workflow. Width should generally match how the GIF will be viewed: 640-800px if it's going straight into documentation at roughly its recorded size, narrower if it's headed for a chat message or ticket comment.

Recording a shorter, more focused clip in the first place — just the steps that matter, without the setup — will always beat trying to compress a long recording down afterward, since GIF file size scales directly with frame count.

What's actually running behind this converter

This tool loads a real video-encoding engine, compiled to WebAssembly, directly into your browser tab — the same category of software a desktop editor would use, running inside a web page instead. It decodes your WebM's video stream, samples frames at your chosen rate, scales each one to the target width, and assembles the output as a looping GIF, entirely on your own device.

That engine is roughly 25MB and downloads once per browser session the first time you use any video tool here; it's cached afterward, so repeat conversions in the same session start immediately without re-downloading anything.

Trimming before you convert

If your recording software doesn't offer trimming, most operating systems include a basic video trimmer built in — cutting a 30-second recording down to the essential 5 seconds before converting here will produce a noticeably smaller, faster-converting GIF than processing the full-length clip and hoping the settings alone make up the difference.

Frequently asked questions