Developer Tools

Format JSON, test regular expressions, convert data and work with timestamps. Free online utilities for everyday development tasks.

{ }

JSON Formatter

Format, validate and minify JSON data.

Base64 Encoder & Decoder

Encode or decode Base64 text locally.

Unix Timestamp Converter

Convert Unix timestamps and readable dates.

URL Encoder & Decoder

Encode or decode URL-safe text.

UUID Generator

Generate random UUID v4 identifiers.

JWT Decoder

Decode JWT headers and payloads.

{ }

Hash Generator

Generate SHA-1, SHA-256, SHA-384 and SHA-512 hashes of local text or files.

{ }

Regex Tester

Test JavaScript regular expressions and inspect matches, captures and positions.

{ }

Number Base Converter

Convert large integers between binary, octal, decimal and hexadecimal without precision loss.

{ }

HTML Entity Encoder & Decoder

Encode HTML special characters or decode named and numeric entities into plain text.

{ }

Color Converter

Convert HEX, RGB and HSL colors with normalized values and a local preview.

{ }

CSV ↔ JSON Converter

Convert CSV with headers to JSON or flat JSON objects to properly escaped CSV.

Text to Slug

Turn a heading or phrase into a lowercase, hyphen-separated URL slug with sensible Unicode handling.

{ }

JSON ↔ YAML Converter

Convert JSON to readable YAML or YAML to formatted JSON locally, with safe parsing and clear errors.

Choose the right tool

Choose a formatter for readability, an encoder or converter for a specific representation, or a validator to inspect input. Encoding is not encryption, and decoding a JWT does not verify its signature.