UtilToolkits2025-12-21
TL;DR — UtilToolkits is a free, privacy-first collection of 90+ developer and productivity tools that run entirely in your browser. Start with the three most-used: JSON Formatter, Password Generator, and Image Compressor. Or browse by category: Coding, Image, CSS, Text, Math.
Every developer has done this loop: search "json formatter online" → land on a site plastered with ads → paste production data into a textbox → wonder, mid-paste, whether it’s being logged somewhere. Repeat for password generation, regex testing, image compression, Base64 decoding, and a dozen other one-shot tasks per week.
The web is full of utility sites, but most of them are not built for the person using the tool — they’re built for ad impressions. Slow, intrusive, and quietly logging your inputs.
One bookmark. 90+ tools. Three rules:
Half the things you paste into "online tools" are sensitive: production JSON with customer emails, JWTs containing user IDs, API responses that haven’t shipped yet, password drafts. Tool sites that POST your input to a server are a quiet data-exfil risk that fails any real security review. The UtilToolkits architecture is deliberate: all heavy lifting happens in WebAssembly or plain JS in your browser. Your inputs never reach our servers because there’s no API endpoint to reach.
Yes. No tier-locked tools, no signups, no trial periods.
No. Tools process locally in your browser. We collect anonymous aggregate page-view counts — never inputs or outputs.
Most do once loaded. Open the tool once, then disconnect — JSON formatting, Base64, UUIDs, password generation all keep working.
Use the Request a Tool page. New tools get added every week based on requests.