JWT Decoder

Decode a JSON Web Token header and payload in your browser. Signature is not verified (view-only).

QR Code Generator

Create a QR code from any text or URL. Generated locally in your browser.

Test regular expressions against text. Matches are highlighted. Runs entirely in your browser.

Pattern

Flags

g (global) i (ignore case) m (multiline) s (dotAll)

Write Markdown on the left and see live HTML preview. Fully client-side, nothing is uploaded.

Generate a cryptographically random UUID v4 (RFC 4122).

Encode text to Base64 or decode Base64 back to text.

Beautify, minify and validate JSON. Nothing is sent to a server.

Compute SHA-256, SHA-1 or SHA-512 using the Web Crypto API.

Algorithm

Percent-encode or decode URLs and query strings.

Convert between UPPER, lower, Title Case, camelCase, snake_case and kebab-case.

Count words, characters, lines and approximate reading time. Updates as you type.

Words: 0 · Characters: 0 · Lines: 0 · ~0 min read

Convert between Unix timestamps and human-readable dates.

Timestamp (seconds or ms)

Date & Time

Strong random passwords via Web Crypto API. Nothing is stored.

Length: 16

Uppercase (A-Z) Lowercase (a-z) Numbers (0-9) Symbols (!@#$...)

Generate placeholder Latin text for mockups and designs. Runs entirely in your browser.

Paragraphs: 3

Convert between HEX, RGB and HSL. Preview live. No data leaves your device.

HEX

RGB

HSL

Preview

Compare two texts line-by-line. Added lines +, removed lines −. Fully client-side.

Original (A)

Changed (B)