All Developer Tools
Format and inspect code, convert structured data, or test HTTP workflows. Most tools process locally; network tools explain which services receive requests.
Inspect and format data
Use JSON Formatter for strict syntax, tree exploration, and formatted text comparison. Use SQL Formatter to lay out a query in its selected dialect; it does not validate execution.
Convert and validate structured data
Move flat records into a spreadsheet with JSON ↔ CSV. Check an explicit contract with JSON Schema, or infer a starting TypeScript type from one sample.
Investigate HTTP and webhooks
Send a request with API Client, inspect incoming test webhooks with Request Catcher, or open a WebSocket connection. These tools contact servers; check the processing disclosure before sending data.
All 20 tools in this category
JSON ↔ CSV
Convert flat records and tables
Open toolJSON Schema Validator
Validate JSON against a draft-07 schema
Open toolJSON to TypeScript
Infer types from a JSON example
Open toolAPI Client
Send HTTP requests
Open toolBase64
Encode/decode
Open toolCode Beautifier
Format HTML/CSS/JS
Open toolCron Parser
Parse cron
Open toolDiff Checker
Compare text
Open toolHash Generator
MD5, SHA
Open toolJSON Formatter
Format & validate JSON
Open toolJWT Decoder
Decode tokens
Open toolMarkdown Renderer
Render markdown
Open toolOnline Compiler
Run code live
Open toolRegex Tester
Test patterns
Open toolRequest Catcher
Capture requests
Open toolLocal Proxy
Forward to localhost
Open toolSQL Formatter
Beautify SQL queries
Open toolURL Encoder
Encode URLs
Open toolUUID Generator
Generate IDs
Open toolWebSocket Client
WS connections
Open tool