Free Developer Tools: JSON, Base64 & Network
Developer tools in your browser
Format JSON, compare text, encode Base64, test regex, generate UUIDs, and troubleshoot networks. Free browser-based developer tools in one searchable workspace.
Local formatters and converters process data in your browser. Network tools contact the selected target or lookup provider. JavaScript is required to run tools; selected non-sensitive activity can be retained by the existing History feature.
Browse the complete tool directory
- Domain WHOIS, IP Registration and ASN Lookup
- HTTP API, Header and CORS Tester
- JSON Formatter and Validator
- Online Text Diff & Compare Tool
- Base64 to ASCII Decoder
- Base64 to Audio Decoder
- Basic Auth Decoder
- Base64 to File Converter
- Base64 to Hex Converter
- Base64 to Image Converter
- Base64 to PDF Converter
- Base64 to Text Decoder
- Base64 to Video Decoder
- Audio to Base64 Converter
- CSS to Base64 Encoder
- File to Base64 Converter
- Hex to Base64 Converter
- HTML to Base64 Encoder
- Image to Base64 Converter
- PDF to Base64 Converter
- Text to Base64 Encoder
- URL to Base64 Encoder
- Video to Base64 Converter
- Local Network Device Discovery
- HTTP Health Check Tool
- Public IP Checker
- DNS Lookup Tool
- Browser Port Checker
- Subnet Calculator
- Browser Speed Test
- JavaScript Regex Tester: Matches & Groups
- JWT / OAuth Token Inspector
- URL Encoder / Decoder
- SQL Formatter
- UUID / GUID Generator
- Unix Timestamp Converter
- Hash Generator
- Cron Schedule Builder
- JSON Schema Tools
- JSON / YAML Converter
- JSON / CSV Converter
- JSON Model Generator
- XML Formatter / Validator
- YAML Formatter / Validator
- CSV Viewer / Validator
- SQL IN-Clause Generator
- Mock Data Generator
- Password Generator
- Password Strength Checker
- HMAC Generator / Validator
- Certificate / CSR Inspector
- IPv4 / IPv6 Calculator
- chmod Calculator
- URL Parser
- User-Agent Parser
- MIME Type Lookup
- HTML Formatter / Minifier
- CSS Formatter / Minifier
- JavaScript Formatter / Minifier
- Markdown Previewer
- Log / Stack Trace Formatter
- cURL to Code Converter