Convert a local video to MP4 or WebM in your browser. Desktop only. Free, no upload.
Video conversion with a WASM engine is heavy on phones. Mobile visitors see a notice and never download the engine, avoiding crashes and huge data use. Use a laptop or desktop Chromium/Safari/Firefox build.
No. Processing stays in your browser. Files are not sent to Power Tools servers for conversion.
No. Only local files are accepted. We do not download streaming URLs. Export or save the file you own, then select it here.
About 100 MB and about 10 minutes for most jobs. Trim longer sources first with Trim Video.
The shared conversion engine downloads once (~12 MB compressed) and is often cached afterward across sibling tools in this cluster.
Yes. Free without an account. No cloud conversion quota because work stays on your device.
Open the result in a second app or tab, compare against a small known-good sample, and only then send it to clients or commit it to git. Prefer the highest-quality source, fix orientation early, and compress only once at the end so artifacts do not stack across tools. If something looks wrong, adjust one setting at a time and rerun rather than stacking multiple weak exports.
Browser memory and CPU bound large jobs. Close unused tabs, try a smaller fixture first, then scale up. Desktop browsers are usually more reliable than phones for heavy media or WASM paths. After finishing, clear Downloads and the tool workspace when files contain personal or customer data.
Skip it as the sole system of record when you need multi-user collaboration, enterprise audit trails, or legally certified processing. Use your approved platform for those cases, and treat this page as a fast local assistant. Keep authoritative masters outside the browser session.