FreePrivateConvert
100% Free & Private — Runs Locally via Browser WebAssembly

Convert anything. Upload nothing.

The free, private file converter with no upload: 92 tools for video, audio, images, PDFs and data that run entirely in your browser.

Jump straight to a tool

Every conversion runs locally — pick one to get started.

Merge PDFPDF to JPGMOV to MP4WAV to MP3Compress PDFJSON to CSV

Popular conversions across every format

A sample of the conversion tools below — click a tile to open it.

Files never leave your device

Every conversion runs locally via WebAssembly. Nothing is uploaded, ever.

No queue, no wait

Conversion starts the instant you drop a file — no server round-trip.

Real ffmpeg, in your browser

The same engine behind professional video tools, compiled to WebAssembly.

How it works

Three steps, all of them on your device.

1. Drop file

Drag a file in or pick one — nothing leaves your device yet.

2. Local WASM processing

Your browser's own WebAssembly engine converts it, entirely on-device.

3. Instant save

Download the result immediately — no upload, no queue, no server.

Frequently asked questions

Do you store or upload my files?
No. Every conversion runs inside your browser tab, using WebAssembly, the browser's Canvas API or JavaScript PDF libraries, so the file never leaves your device. There is no upload step at all.
How can I check that my file isn't uploaded?
Open your browser's developer tools, go to the Network tab, and convert a file. You'll see the converter's own code load from this site (the video engine, the first time), but no request carrying your file.
Is it really free?
Yes. There's no paid plan, no trial and no watermark. The site may show ads in the future; if it does, they will never receive your files, and the Privacy Policy will be updated first.
Do I need an account or to install anything?
No. Open a converter page and use it. Nothing to sign up for and nothing to install.
Is there a usage limit?
No. Conversions run on your own device, so there's nothing to ration: convert as many files as you like, up to 500MB each for video, audio and images, and 200MB for PDFs.
What can I convert?
92 conversions across video (MP4, MOV, MKV, AVI, WebM, GIF), audio (MP3, WAV, AAC, M4A, FLAC, OGG), images (JPG, PNG, WebP, HEIC, AVIF, TIFF, BMP, SVG, GIF), PDF tools (merge, split, compress, PDF to JPG, JPG to PDF) and data (JSON, CSV, Markdown), plus tools to compress videos, resize and compress images, and make .ico icons.
Why does the first video conversion take longer?
Video and audio conversions use a WebAssembly build of ffmpeg, about 30MB, which your browser downloads once per tab. Conversions after that start immediately. PDF tools and most image tools don't need it (TIFF conversions do).
Why is video conversion slower than desktop software?
It runs on a single CPU core inside the browser, while desktop apps can use every core and your graphics hardware. Short clips are quick; long or 4K videos can take several minutes.
Is the quality the same as desktop ffmpeg?
It's the same ffmpeg engine, compiled to WebAssembly. Each video and audio converter page shows the exact command and settings it uses, so you can run the identical command on your computer if you prefer.
Does it work on my phone?
Yes, in any modern mobile browser. Very large files need a lot of memory, so on a phone it's best to convert one file at a time and keep the tab open until the download appears.