SplitPDF
Split PDF files locally in the browser
Privacy-First Online Tools
These tools describe themselves as privacy-first: the work happens on your device, using browser features like the File API, Canvas, Web Crypto and WebAssembly, instead of sending your file to a server.
Start with these
- SplitPDF Splits PDF files locally in the browser with no uploads.
- FormatKit A client-side toolkit for formatting, validating, minifying, viewing, and diffing JSON.
- CompressPixel Compresses JPG, PNG, and other images in the browser with batch support.
Want to know whether a tool uploads your files? See how browser-based tools work.
83 tools shown
PDF tools
Use this group to split, merge, edit, or convert PDF files privately.
Image privacy
Use this group to compress, crop, edit, or inspect images and screenshots locally.
Data and text
Use this group for JSON, CSV, XML, SQL, text checks, and comparisons.
Calc and planning
Use this group for calculators and private planning tools for health, money, dates, and more.
Media and audio
Use this group to convert, compress, edit, or time video and audio in the browser.
Security and sharing
Use this group for passwords, QR codes, WiFi access, links, forms, polls, and citations.
Other tools on this shelf that do a specific job.
Questions about Privacy-First Online Tools
How can a website process a file without uploading it?
The page's JavaScript reads the file you pick straight from your disk into memory, processes it there and hands you the result as a download. No request carries the file anywhere.
Can I use these offline?
Once a page has fully loaded, a purely client-side tool keeps working if you disconnect. That is a quick informal test too.