desnar
The developer toolkit

A little less busywork.

Free tools to format, convert, test, and generate. Pick a tool and get straight to work.

Developer tools

16 tools

JSON Formatter & Validator

Format, validate, and minify JSON with clean indentation and error checks.

JWT Decoder

Decode JWT header and payload instantly with pretty JSON output.

SQL Formatter

Beautify SQL queries with clean indentation and keyword casing.

Base64 Encoder & Decoder

Encode or decode Base64 for text and files.

URL Encoder & Decoder

Encode and decode URLs and query parameters.

Regex Tester

Test regular expressions with matches, groups, and flags.

UUID Generator

Generate UUID v4 identifiers in bulk for apps and databases.

Password Generator

Create strong passwords with length and character options.

HTML, CSS & JS Editor

Edit HTML, CSS, and JavaScript with a live preview.

JavaScript Playground

Run JavaScript in your browser with instant output and error reporting.

Markdown Preview

Write Markdown and preview HTML instantly.

CSV to JSON Converter

Convert CSV data to JSON with headers and type detection.

XML Formatter

Format, validate, and minify XML with clean indentation.

Text Case Converter

Convert text to UPPERCASE, lowercase, sentence case, and title case.

Text Diff Checker

Compare two versions of text or code and inspect every change side by side.

WhatsApp Message Sender

Send personalized WhatsApp messages to recipients from a validated CSV list.

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