5 tools
Developer
Format, encode, and debug like a pro.
New
Free JSON Formatter & Validator
Format, validate, and minify JSON instantly. Pretty-print with custom indentation, sort keys, view stats — 100% free, no data leaves your browser.
DeveloperOpen
NewFree Base64 Encoder & Decoder
Encode text or files to Base64 and decode Base64 back to text — instantly, free, and 100% in your browser. Supports Unicode and file uploads.
DeveloperOpen
NewFree Online URL Encoder / Decoder
Encode and decode URLs, query strings, and Base64URL instantly. Handles special characters, Unicode, and percent-encoding.
DeveloperOpen
NewFree Online Regex Tester
Test regular expressions in real time with match highlighting, capture groups, and a replace mode. Runs entirely in your browser.
DeveloperOpen
NewToken Counter & Cost Calculator — GPT, Claude, Gemini
Count tokens, estimate API cost, and check context-window fit for GPT-4o, Claude, and Gemini. Free, exact OpenAI tokenizer, 100% in-browser — no upload.
DeveloperOpen