A private, free alternative to Sejda
Change text right inside the PDF, in its own font, size and colour, then redact, merge, split, compress or reorder pages, all in your browser. There is no task limit or page cap: only your device’s memory sets the size.
Free forever · Runs on your device · 0 bytes uploaded
How Fizzdoc works
- Your file stays on your deviceEvery tool runs inside your browser tab, and the page is blocked from sending files anywhere. You can check it in your browser’s Network tab.
- Free, with nothing attachedNo account, no daily limit, no watermark and no paid plan. Open source under Apache-2.0.
- Works anywhereAny modern browser on Windows, Mac, Linux, Android or iPhone, with nothing to install, in 16 languages.
Sejda is a trademark of its owner and is named only to say what this page is about. Fizzdoc is an independent project, not affiliated with or endorsed by Sejda.
Fizzdoc tools for the jobs people use Sejda for
Each one works in your browser, free, without uploading anything.
- Edit PDFChange existing text, add text and white-out, right on the page.
- Redact PDFBlack out text, signatures or photos so they’re gone for good.
- Merge PDFCombine several PDFs into one, in the order you choose.
- Split PDFExtract the pages you need into a new PDF.
- Compress PDFShrink a PDF by optimizing its images. Text stays sharp.
- Reorder PDF PagesPut the pages of a PDF in a new order.
- Delete PDF PagesRemove pages you don’t want to share.
- Rotate PDFTurn sideways pages the right way, permanently.
- Extract PDF PagesSave selected pages as a new PDF.
- Watermark PDFStamp text like CONFIDENTIAL across every page.
- Add Page NumbersNumber every page of a PDF.
- PDF to WordTurn PDF text into an editable .docx.
Private by design — and you can check
Your files are never uploaded, because there is nowhere to upload them to.
- No upload step existsFiles are read and written inside this browser tab. There is no server that could receive them.
- The browser enforces itThis page’s Content Security Policy only allows connections back to this site, which serves nothing but the app itself.
- See for yourselfOpen developer tools, watch the Network tab and run a job: no request carries your document.
- Open sourceEvery line is on GitHub, built on qpdf, pdf.js & pdf-lib.
Frequently asked questions
How can Fizzdoc work without uploading my file?
Every tool runs inside your browser tab, using engines compiled to WebAssembly. Your file is read from your device, processed there and saved back to it. The page is only allowed to talk to fizzdoc.com, which serves nothing but the website itself, and you can watch your browser’s Network tab to see that no file leaves.
Does edited text keep the original font?
Yes, when the PDF’s font already has every letter you type: the line is rewritten inside the file with the same font, size and colour. If a letter is missing, that line uses the closest standard font instead.
Is there a limit on tasks or pages?
No. Very large files are limited only by your device’s memory, and Fizzdoc checks before it starts.
Is Fizzdoc made by Sejda?
No. Fizzdoc is an independent, open-source project and is not affiliated with or endorsed by Sejda. Sejda is a trademark of its owner and is named only to say what this page is about.
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