FastestChecker
20 free, no-signup web tools every developer needs
Start new thread

FastestChecker - 20 free, no-signup web tools every developer needs

by•
FastestChecker is a free toolkit of 20+ browser-based utilities for developers: IP checker, JWT decoder, email validator, password generator, speed test, and more. No signup, no paywalls, most tools run entirely client-side.

Add a comment

Replies

Best
Maker
📌
Hey Product Hunt! I built FastestChecker because I was tired of having 15 browser tabs open just to do routine dev checks — what's my IP, is this JWT valid, will this email actually bounce — each one behind a different sign-up wall or ad-gated redirect. FastestChecker puts 20+ of these tools in one place, free, with no account required. A few I use almost daily: IP Checker — see your current public IPv4/IPv6 in one click JWT Decoder — inspect a token's header/payload without pasting it into a random site you don't trust Email Validator — syntax + MX record checks before you trust a signup Password Generator — configurable, generated entirely client-side Speed Test, PageSpeed Checker, Domain Age Checker, and more Most of these run client-side in your browser — nothing gets sent to a server just to check your own IP or generate a password. Would love feedback on what's missing. What's the one "quick check" tool you always end up hunting for online? Happy to add it. Thanks for checking it out!

Honestly the no-signup thing is what got me, just opened it and decoded a jwt in like two seconds. Kinda nice having everything in one place without getting hit with a paywall.

Finally something that just works without making me sign up for an account first. The JWT decoder ran instantly in my browser and I love that the password generator doesn't even hit a server.

A dark mode toggle for all the tools would be great since I usually end up on these late at night and the bright white background gets harsh. Bonus points if it remembers the preference between sessions.

Client-side tools that actually load instantly are rare, and the JWT decoder here is the cleanest I've used in a while. Nice to see the no-signup approach still alive.

having a quick-access option like a chrome extension or bookmarks toolbar popup would be amazing for using these tools without opening the site every time.

Finally something that doesn't beg for a login before I can decode a JWT. Used the IP checker and password generator today, both worked instantly in the browser.

Love that everything runs client-side, it makes the IP checker feel instant and keeps things private. The no-signup approach is refreshing too.

Love that the tools run client-side with zero signup friction. The JWT decoder especially feels snappy and clean.

The client-side approach is a nice touch, means my test data never leaves the browser. Tried the JWT decoder and it gave me exactly what I needed without any signup friction.

12
Next
Last