Runs on-device · No upload · No sign-up

Convert, resize & create without the upload.

Video and audio conversion, image resizing, and AI image generation — done right in your browser tab (or, for AI generation, via a direct API call). Nothing you convert or resize ever leaves your device.

Drop a video or audio file here
or click to browse — nothing uploads anywhere

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Best for files under ~300MB — larger files take longer since your device does the work, not a server.

01 · Choose

Pick a tool

A file to convert, an image to resize, or a prompt to generate from.

02 · Process

Runs locally

Video/audio and image tools run on-device via WebAssembly and Canvas — no upload.

03 · Download

Save the result

Straight from your browser. No queue, no email, no watermark.

↺ conversion and resizing start and end on your device — they never go anywhere in between

Private by design

Conversion and resizing happen in your browser, never uploaded.

No account needed

No sign-up, no email, no login wall for the converters.

Free, no watermark

Your files are yours, unmarked and unlimited.

Three tools in one

Converter, image editor, and AI generator on one page.

Supported formats

Video & audio

MP4MOVWebMMKVGIF MP3WAVOGGFLACAACM4A

Images

JPGPNGWebP

Frequently asked questions

Is ConvertLocal really free? +
Yes — no sign-up, and no watermark on what you convert or resize.
Do you store or see my files? +
No. The converter and image tools run inside your browser using WebAssembly and Canvas. Your file is never uploaded to a server.
What formats are supported? +
Video: MP4, MOV, WebM, MKV, and GIF. Audio: MP3, WAV, OGG, FLAC, AAC, and M4A. Images: JPG, PNG, and WebP.
Can I resize or convert images too? +
Yes — the Image Tools tab resizes, compresses, and converts between JPG, PNG, and WebP, entirely in your browser.
How does the AI image generator work? +
It sends your prompt to an image generation API and returns a picture — no sign-up needed. Free anonymous use is limited to roughly one image every 15 seconds; that's a limit set by the image API itself, not this site.
Is there a file size limit? +
No hard limit, but since your device does the work, very large files will simply take longer.