All Tools

Test and explain regular expressions with real-time matching and plain English explanations.

Format, validate, and beautify JSON data with syntax highlighting and error detection.

Decode a JSON Web Token, read its claims, check expiry, and verify HS, RS or ES signatures — without the token ever leaving your browser.

See how a link will look when shared, and what's stopping the preview image from showing.

Convert epoch timestamps to readable dates and back, with the unit detected automatically and a live clock.

Percent-encode and decode URLs, and read any query string as a plain, already-decoded table.

Encode and decode Base64, including UTF-8 text, URL-safe output, and files or images as data URIs.

Generate MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes for text or files, without uploading anything.

Create strong random passwords with real entropy figures, generated locally and never transmitted.

Generate random v4 or time-ordered v7 UUIDs in bulk, in whichever format your system expects.

Create QR codes for links, text or Wi-Fi networks. Pick your colours and download as PNG or print-ready SVG.

Shrink and convert images to WebP, JPEG or PNG on your own device — your photos are never uploaded.

Turn one color into a full 50-950 shade scale, with contrast checks and ready-to-paste CSS, Tailwind or JSON.

Count words, characters, sentences and paragraphs as you type, with reading time and keyword density.

Convert names between camelCase, snake_case, kebab-case and more — all at once, acronyms intact.