URL Encode/Decode
Encode and decode URLs with percent-encoding support.
Developer Tools26 indexed toolsClient-side first
Developer Tools tools
Format code, convert data structures, and clean up messy developer input.
JSON Formatter & Validator
Format, validate, and minify JSON with error highlighting.
HTML/XML Escape
Convert special characters to and from HTML entities.
CSS Minifier/Formatter
Minify or beautify CSS code for optimization.
JavaScript Minifier/Formatter
Minify or beautify JavaScript code for production.
SQL Formatter
Format and beautify SQL queries for better readability.
YAML to JSON Converter
Convert between YAML and JSON formats instantly.
CSV to JSON Converter
Convert CSV data to JSON and vice versa with ease.
Markdown to HTML Converter
Render markdown into clean sanitized HTML with a live preview.
HTML to Markdown Converter
Convert raw HTML into readable markdown syntax.
XML Formatter & Validator
Pretty-print XML and flag malformed markup in your browser.
JSON to XML Converter
Transform JSON objects into formatted XML markup.
SQL to JSON Converter
Turn SQL INSERT statements into JSON data structures.
Pretty Log Formatter
Clean up JSON logs, key-value lines, and stack traces for readability.
Base64 Image Encoder
Convert uploaded images directly into Base64 strings.
Data URI Generator
Generate inline data URIs from uploaded files and text assets.
Environment Variables Parser
Parse `.env` style content into structured JSON and key/value tables.
Cron Expression Parser
Validate cron schedules and preview upcoming run times.
Class Diagram Maker
Draft Mermaid-compatible UML class diagrams with a browser-based editor and board preview.
ER Diagram Maker
Create entity-relationship diagrams with schema notes, Mermaid output, and a visual board summary.
Flowchart Maker
Build process diagrams and flowcharts from Mermaid-style syntax with export-friendly output.
Sequence Diagram Maker
Visualize API and system interactions with Mermaid-compatible sequence diagram editing.
Query String Parser
Parse URLs and query strings into readable key-value parameters instantly.
Regex Escape Helper
Escape plain text safely for regular-expression literals and search patterns.
JSON Path Finder
Search nested JSON objects and return matching paths for keys and values.
JSON Schema Builder & Validator
Generate JSON Schema from sample payloads, validate example objects, and inspect required fields or type mismatches. It is useful when teams need portable contracts without spinning up a backend.