DevTools Hub

Format, validate, and inspect JSON directly in your browser.

Format and inspect XML documents.

Encode and decode Base64 strings directly in your browser.

Decode percent-encoded URLs and query strings back into readable text.

Encode text for URLs, or break a URL into its parts and decoded query parameters.

Encode and decode HTML entities.

Convert text to and from Unicode escape sequences.

Test regular expressions with live match highlighting and capture groups.

Compare two blocks of text line by line, with the changed words highlighted.

Convert text between camelCase, snake_case, kebab-case, Title Case, URL slugs, and more.

Split long text into overlapping chunks by tokens, words, or characters for RAG and LLM prompts.

Generate UUID values locally.

Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 digests at once.

Decode JWT headers, payloads, and expiry claims locally.

Generate secure passwords and see the entropy behind them.

Generate and verify HMAC signatures for text payloads.

Convert Unix timestamps and readable dates.

Calculate the difference between two dates.

Inspect cron schedules in readable form.

Convert a date and time between time zones and see day and night on a world map.

Convert RGB to HEX color codes and back, plus HSL and CSS color names, with contrast checks.

Convert between units of length, weight, temperature, area, volume, and speed.

Convert between CSV and JSON directly in your browser.

Convert integers between binary, octal, decimal, and hexadecimal with arbitrary precision.

A quick game: name a swatch's hex code, or spot the swatch that matches a hex code.