Developer tools

Format JSON, convert data, encode text and inspect colors and timestamps. No account required.

JSON Formatter & Validator

Prettify, validate, tidy, and minify JSON data with instant error check.

Base64 Encoder & Decoder

Encode plain text to Base64 or decode Base64 back to clean UTF-8.

UUID / GUID Generator

Generate RFC 4122 Version 4 UUIDs and GUIDs in bulk instantly.

UTM Builder & URL Encoder

Encode query parameters and build Google Analytics campaign tracking URLs.

Markdown to HTML Converter

Convert common Markdown headings, lists, code blocks and simple tables into HTML.

HTML Entity Encoder & Decoder

Encode special characters into HTML entities or decode entities back into plain text.

Unix Timestamp Converter

Convert Unix epoch timestamps to human-readable UTC/local dates and vice versa.

Color Code Converter

Convert color values between HEX, RGB, and HSL with contrast preview and code copy.

CSV to JSON Converter

Convert CSV spreadsheets and tabular data into clean, structured JSON arrays.

Choose the right tool

The JSON formatter preserves numeric literals. Base64 and HTML entities encode text; they do not encrypt it. CSV conversion retains cell values as strings to avoid silently changing identifiers or large numbers.