
Do Online PDF Tools Upload Your Files? We Tested 18
Same file, 18 free tools, every network request logged
Notes from building editpdf.tools: privacy-first PDF and image tools that run in your browser, so your files stay on your device. I write about what happens to documents when you upload them online, how to check whether a tool uploads your files, and the lessons we learn while building simple tools for real problems like signing a PDF or putting both sides of an ID card on one page. Written by Chandan Singh, founder of editpdf.tools.

Same file, 18 free tools, every network request logged
TL;DR: Our Chrome extension Compress Image to KB by editpdf.tools turns a JPG, PNG or WebP photo into a JPG under a target size, such as 50 KB. It runs a binary search over JPG quality with canvas.toB

Our site, editpdf.tools, runs its free tools entirely in the browser: files never go to a server. When users asked for iPhone HEIC support and WebP to PDF, that constraint shaped every decision. Here

A plain explanation of uploads, servers and why we built PDF tools that work inside the browser.
