BatchCrunch
Batch compress, convert, resize, crop and watermark video, audio and images in your browser — nothing is uploaded.
About BatchCrunch
BatchCrunch processes folders of video, audio and image files entirely inside your browser tab. It is ffmpeg compiled to WebAssembly, running on your own CPU, so files are never uploaded to a server. That removes the two limits every online converter has: there is no upload size cap and no queue behind someone else's machine. After the first load the encoder is cached, so it keeps working with the network switched off.
Drop a whole folder and set one recipe per media type. Compress and convert video, audio and images; crop or change aspect ratio, resize, rotate, flip and add a text or image watermark to video and images; rename the output files. Every file shows an estimated output size before it runs and its real size, delta and a side-by-side preview after. Each file has its own state and its own retry, so one bad file does not stop the batch.
It is not a video editor: no timeline, no trimming, no subtitles. It does one job, in bulk.
Free for 3 files per batch, no account and no email required. A one-time $19 licence removes the batch limit and changes nothing else — every format and every edit is already in the free tier. The key is signed and verified offline in the browser, so it does not depend on this site staying online, and there is no subscription.
Medias
Key features
Nothing leaves the browser
FFmpeg compiled to WebAssembly runs on your own CPU — no upload, no file size cap, no queue behind someone else's machine.
Batch by folder, not by file
Drop a whole folder and set one recipe per media type — every file runs through its own recipe with its own progress and its own retry.
Formats, resizing and watermarks
Compress and convert video (MP4, WebM, MKV), audio (MP3, M4A, WAV, FLAC) and images (JPG, PNG, WebP); batch crop, resize, rotate, flip and add text watermarks.
Estimates before, proof after
Every file shows its estimated output size before it runs, then its real size, the delta, and a side-by-side before/after preview.
Pricing
Full pricing pageFree
3 files per batch — every format and every edit included, no account required.
- All output formats (video, audio, image) and every edit
- Full 200 MB per file
- No account, no email required
Unlimited
Unlimited batches — one payment, forever. Same encoder, same output, no subscription.
- Unlimited files per batch
- One licence key works in every browser, verified offline
- No subscription, no renewal, no expiry
FAQ
Fit profile
Badges
Promote BatchCrunch giving it more exposure, by adding these badges to your website, documentation, or product listing. Each badge links back to BatchCrunch page on Webfolio.
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Resources
Pricing summary
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