Free Online Developer Tools

Fast, free, and ready to use. No signup, no installs, no nonsense.

JSON Formatter

Format, validate, and minify JSON data instantly in your browser.

Generate strong, random passwords with custom length and character sets.

Encode or decode Base64 strings instantly without any server calls.

Convert colors between HEX, RGB, and HSL formats with a live preview.

Count words, characters, sentences, paragraphs, and estimate reading time.

Encode or decode URLs and query strings for safe web transmission.

Convert Unix timestamps to human-readable dates and vice versa.

Test and debug regular expressions in real time with live match highlighting.

Generate SHA-1, SHA-256, and SHA-512 cryptographic hashes from any text.

Generate placeholder text by paragraphs, sentences, or words for your designs.

Convert between binary, octal, decimal, and hexadecimal instantly.

Every tool on freedevtool is completely free to use. No subscription, no freemium tier, no hidden limits. Just open and use.

All tools run entirely in your browser. Your data — passwords, JSON, code — never leaves your device. No server, no logs, no tracking.

Open any tool and start working immediately. No account, no email, no captcha. Built for developers who value their time.