Base64 Encoder/Decoder
Encode and decode Base64 data instantly. Simple, fast, and secure client-side conversion.
Use toolURL Encoder/Decoder
Encode and decode URLs instantly. Parse query strings, analyze URL components, and handle special characters.
Use toolJSON Formatter & Validator
Format, validate, and inspect JSON. Magic auto-fix, tree explorer, and minify — all in your browser.
Use toolJSON to CSV Converter
Convert JSON arrays to CSV, Excel, and Sheets. Flatten nested objects, handle custom delimiters, and download results.
Use toolJSON to Table Converter
Visualize JSON as interactive tables. Nested sub-tables, tree view, filter & search, export to CSV/HTML.
Use toolXML to Table Converter
Visualize XML as interactive tables. Nested sub-tables, tree view, filter & search, export to CSV/HTML/JSON.
Use toolYAML ↔ JSON Converter
Convert YAML to JSON and vice versa. Real-time bidirectional conversion, validation, and download options.
Use toolYAML ↔ XML Converter
Convert YAML to XML and vice versa. Real-time bidirectional conversion, validation, and download options.
Use toolJSON ↔ XML Converter
Convert JSON to XML and vice versa. Real-time bidirectional conversion, validation, and download options.
Use toolJWT Decoder
Decode and inspect JSON Web Tokens. View header, payload, verify signatures, and analyze claims.
Use toolHash Generator
Generate MD5, SHA-1, SHA-256, SHA-384, SHA-512 hashes from text or files. Verify checksums instantly.
Use toolUUID Generator
Generate unique UUIDs/GUIDs in v1, v4, v5 formats. Bulk generation, validation, and multiple output formats.
Use toolTimestamp Converter
Convert Unix timestamps to dates and vice versa. Live clock, timezone support, and multiple output formats.
Use toolSQL Formatter
Format and beautify SQL queries with syntax highlighting. Support for MySQL, PostgreSQL, SQL Server, and more.
Use toolRegex Tester
Test regular expressions with real-time match highlighting. Common patterns library and replace mode.
Use toolPassword Generator
Generate strong, secure random passwords with customizable length, character types, and modes.
Use toolCron Expression Builder
Build cron expressions visually with human-readable descriptions. Preview next scheduled runs.
Use toolCSV to JSON Converter
Convert CSV data to JSON format with configurable parsing options and type detection.
Use toolMarkdown to HTML Converter
Convert Markdown to clean HTML with live preview. Copy output instantly or download as an HTML file.
Use toolHTML to Markdown Converter
Convert HTML to clean Markdown with live output, preview, and one-click copy/download.
Use toolJavaScript Minifier/Beautifier
Minify and beautify JavaScript instantly with optional JSON mode, plus quick copy and download.
Use toolDiff Checker
Compare two text or JSON inputs side by side. Ignore key order, jump between changes, and copy a unified diff.
Use toolcURL to Code Converter
Paste a DevTools cURL command and convert it to fetch, Axios, Python, or Go. Secrets can be redacted first.
Use toolString Case Converter
Convert names to camelCase, snake_case, kebab-case, and more. Works on one string or a whole list.
Use toolJSON Schema Validator
Validate JSON against a schema or generate a draft schema from a sample payload.
Use toolJSON to Types Converter
Generate TypeScript interfaces, Zod schemas, or Go structs from a JSON payload.
Use toolCSS Minifier / Beautifier
Beautify or minify CSS and see the size change. Runs entirely in your browser.
Use toolHTML Minifier / Beautifier
Format or minify HTML while optionally preserving pre, script, and textarea blocks.
Use toolFake Data Generator
Generate fake user and order fixtures as JSON, CSV, or SQL inserts for tests.
Use toolJWT Generator
Build and sign HS256 test tokens locally, then inspect them in the JWT decoder.
Use toolEnv File Converter
Convert .env files to JSON, Docker flags, or Kubernetes Secret YAML.
Use toolCIDR / Subnet Calculator
Calculate IPv4 network, broadcast, host range, and check whether two CIDRs overlap.
Use toolQR Code Generator
Generate QR codes for URLs, WiFi, contacts, and more with customizable colors and export options.
Use toolNo tools found. Try a different search term.
Why Use My Dev Tools?
Lightning Fast
Client-side processing means zero latency. Your data never leaves your browser.
100% Free
No subscriptions, no limits. Just useful tools when you need them.
Secure
All processing happens in your browser. I don't see or store your data.
Need a specific tool?
I'm constantly adding new developer tools. Let me know what you'd like to see next.
Request a Tool