Developer Tools

JSON Formatter

Format, beautify, and inspect JSON in your browser with a free online JSON formatter.

JSON Validator

Check JSON syntax in your browser and see clear validation errors.

Regex Tester

Test JavaScript regular expressions against sample text and inspect matches.

Base64 Encoder / Decoder

Encode text to Base64 or decode Base64 back to readable text in your browser.

Markdown Previewer

Write Markdown and preview the rendered result in your browser.

Case Converter

Convert text between uppercase, lowercase, title case, sentence case, camelCase, snake_case, and kebab-case.

Text Diff Checker

Compare two blocks of text and highlight added, removed, and unchanged lines in your browser.

CSV to JSON Converter

Convert CSV data with headers into formatted JSON arrays directly in your browser.

JSON to CSV Converter

Convert JSON arrays of objects into CSV with headers in your browser.

URL Encoder / Decoder

Encode text for URLs or decode percent-encoded URL strings in your browser.

HTML Entity Encoder / Decoder

Encode HTML special characters into entities or decode entities back to readable text.

Hash Generator

Generate SHA-1, SHA-256, SHA-384, and SHA-512 hashes from text or files in your browser.

UUID Generator

Generate UUID v4 values, bulk UUID lists, and lowercase or uppercase output.

Unix Timestamp Converter

Convert Unix timestamps to readable dates and convert dates back to epoch seconds or milliseconds.

Code Minifier

Minify CSS, HTML, or simple JavaScript snippets locally and compare original and compressed size.

JWT Decoder

Decode JWT header and payload data locally in your browser without sending tokens to a server.

YAML JSON Converter

Convert YAML to JSON and JSON to YAML locally with validation and formatted output.

XML Formatter / Validator

Format XML, check parse errors, and inspect document statistics locally in your browser.

Cron Expression Parser

Parse cron expressions, explain schedule fields, and preview upcoming run times.

Password Generator

Generate strong random passwords locally with length, character set, and bulk output controls.

Text to Slug Converter

Convert titles or text into clean URL slugs with separator, lowercase, and character cleanup options.

JSON Diff Tool

Compare two JSON documents and list added, removed, changed, and unchanged paths locally.