Frequently Asked Questions

Yeah, completely free. No tricks, no "upgrade for more" garbage. I built these for myself first - my agency uses them daily. Charging money would mean support tickets and refunds and all that hassle. Not worth it. The tools work, they're free, done.

There's literally no backend. Everything runs in your browser tab. I couldn't see your data even if I wanted to - and I don't want to, I've got enough to deal with. No server logs of your input, no analytics on what you paste in. That's the whole point.

Once you load a page, yeah. I use them on planes all the time (the wifi is always terrible anyway). Bookmark the ones you use most and they'll work without internet. Saved my ass more than once when hotel wifi decided to die.

Copy-paste messy JSON, get it formatted nicely. Or validate it. Or minify it. Whatever you need. When some API spits out a wall of text and you need to figure out what the hell is in there, this is what I reach for. It tells you exactly where the syntax error is when the JSON is broken.

Type your pattern, paste text to test against, see matches light up. That's it. No account needed, no confusing UI with 50 options. Just regex testing. I made it because the browser console is annoying for this and most online testers look like they were designed in 2005.

Base64 (regular and URL-safe), URL encoding, and HTML entities. That covers basically everything I run into. Need to decode some weird API token? Base64. Query string acting up? URL encoding. HTML looking funky? HTML entities. All work fine with emoji and special characters.

Paste the token, see what's inside. Header, payload, nicely formatted. It doesn't verify signatures though - can't do that without the secret key. I use this basically every time auth breaks. Quick sanity check: is the token expired? Wrong audience? This tells you. Just runs locally, nothing leaves your browser.

MD5, SHA-1, SHA-256, SHA-512. If you're hashing passwords or anything security-related, use SHA-256 minimum - MD5 and SHA-1 are basically broken at this point. I mostly use this for generating file checksums and quick content hashes, nothing fancy.

Standard 5-field cron. Works with crontab, AWS, wherever. Shows you the next few runs so you can verify it actually does what you think. Has a visual builder because honestly, who remembers if month is field 4 or 5? I certainly don't.

Both directions, yeah. Super useful when you're working with Kubernetes or Docker Compose (YAML everything) but need to parse it programmatically (JSON). Handles the weird YAML stuff like multi-line strings without choking.

You know when you're digging through logs and see 1706785200 and have no idea when that was? This converts it to actual dates. Works with seconds and milliseconds (because some APIs use one, some use the other, because of course they do).

Sun/moon icon in the header. Click it. It remembers your preference. I use dark mode 99% of the time because staring at a white screen at midnight while debugging is not fun.

Chrome, Firefox, Safari, Edge - all the normal ones. I mostly test on Chrome and Firefox. If something breaks, shoot me an email. Not supporting IE though, it's 2026.

They're responsive, so yeah. Some tools are better on desktop though - trying to use the Diff Checker on a phone is painful. For quick stuff like Base64 encoding or checking a timestamp, mobile works fine.