Free image, PDF & developer tools

About Webkitters

Webkitters is a collection of 87 free browser-based utilities for working with images, PDFs, text and developer data. Unlike most online converters, supported files are processed locally using browser APIs — there is no upload step, no queue, and no copy of your file sitting on someone's server afterwards.

You can resize or compress an image to an exact file size, merge PDFs or shrink one while keeping its text selectable, and generate QR codes that never expire. The text tools cover word counting, comparing two drafts, case conversion and Markdown; the converters handle CSV, JSON, Base64, URL encoding and number bases; the generators make passwords, UUIDs, favicons and gradients. For developers there are 40 tools covering JSON, JWTs, regular expressions, timestamps, cron and subnets.

Everything works without an account, without a watermark, and without a daily limit. Most of it works offline once the page has loaded, because the processing was never happening anywhere else. If you want to understand how that works before trusting it, the how it works page explains the mechanism and how to verify it yourself.