0 bytes uploaded · Open source · Free forever

Free PDF, photo and audio tools that never see your files

Edit photos, remove backgrounds and make collages. Edit, compress, convert and OCR PDFs. Turn speech into text, cut audio, and convert Word, Excel and PowerPoint. Everything runs in your browser — your files never leave your device.

Edit and create

Fix a photo, make a collage, cut out the background or turn it into a sticker, all on your device.

Every tool, private by default

Pick a tool. Your file is processed on this device and never touches a server.

PDF tools 30

Images tools 22

What is Fizzdoc?

Fizzdoc is a free, open-source set of file tools for PDFs, photos, audio, Word, Excel and PowerPoint that runs entirely in your web browser. PDFs are processed with the qpdf, pdf.js and pdf-lib engines, text recognition uses Tesseract, speech to text uses Whisper, and background removal uses the BiRefNet AI model, all on your own device — so nothing is ever uploaded to a server.

Private by design — and you can check

Your files are never uploaded, because there is nowhere to upload them to.

Frequently asked questions

Are my files uploaded anywhere?

No. Fizzdoc does the work inside your browser tab, using open-source engines compiled to WebAssembly and JavaScript. Your file is read from your device, processed locally, and the result is saved straight back to your device. You can check this yourself: open your browser’s developer tools, go to the Network tab, and run a job — no request carries your file.

Is it safe to use for bank statements, ID cards or medical records?

Yes. The file is opened and processed inside your browser tab and is never sent anywhere, so there is no copy on a server that could leak, be sold or be hacked. Your browser enforces this, you can confirm it in the Network tab, and closing the tab clears everything.

How is Fizzdoc different from other online PDF tools?

Many online PDF tools process your document on their own servers. Fizzdoc does the work in your browser tab instead, so there is nothing to upload, store or delete afterwards. It is also open source, and it warns you whenever something such as a bookmark cannot be carried over instead of silently dropping it.

Does it work with Google Docs, Sheets and Slides?

Yes. Download the file from Google as a Word, Excel or PowerPoint file (File → Download) and use the matching Fizzdoc tool. Nothing is sent to Google or to Fizzdoc.

Does it work on my phone?

Yes. Fizzdoc works in current versions of Chrome, Safari, Firefox and Edge on desktop and mobile. Very large files may exceed a phone’s memory; Fizzdoc checks this before starting.

Is Fizzdoc free?

Yes, and it stays free: no sign-up, no watermark, no daily limit and no premium tier. Fizzdoc is open source under the Apache-2.0 license, so anyone can run their own copy.

Free and open source. Forever.

No ads, no accounts, no servers looking at your files. If Fizzdoc saved you time, a star on GitHub helps more people find it.

Star Fizzdoc on GitHub35

Know someone who needs this? Share Fizzdoc with them.