Developer
JSON, timestamp, UUID, Hash, JWT, Cron and other dev essentials
JSON Formatter
Format, minify, validate JSON, convert to Go struct / TS interface
JSON Field Search
Search JSON by field, value or path with highlights, supports jq expressions
Timestamp Converter
Convert between Unix timestamps and dates, seconds and milliseconds
Cron Expression
Generate and parse cron expressions, preview next run time
UUID Generator
Generate UUID v4 / v7 / ULID / NanoID
Hash Calculator
Compute MD5 / SHA1 / SHA256 / SHA512 of text or files
JWT Decoder
Decode JWT header and payload, view expiry time
URL Encoder / Decoder
Encode and decode URL / URI components
HTTP Status Codes
Quick reference of HTTP status codes, meaning and usage
User-Agent Parser
Parse User-Agent strings to identify browser, OS and device
IP Address Tools
Check your IP, validate IPv4/IPv6 and calculate subnets
Chmod Calculator
Convert Linux file permission numbers and symbols
SQL Formatter
Format and minify SQL statements, multiple dialects
YAML ⇄ JSON
Convert between YAML, JSON and TOML
Curl to Code
Convert curl commands to Python / Go / JS / axios code
Code Diff
Compare two texts side by side, highlight changed lines
Token Counter
Estimate token usage in major LLMs
Lorem Ipsum
Generate Lorem Ipsum placeholder text, custom paragraphs
px ⇄ rem Converter
Convert px to rem/em units with custom root font size, batch support
JWT Generator
Generate JWT tokens (HS256) with custom header, payload and secret
JSON ⇄ CSV
Convert between JSON and CSV tables
Code Formatter
Beautify JavaScript / CSS / HTML code
Base Converter
Convert between binary / octal / decimal / hex
CSS Gradient
Visual generator for CSS linear / radial gradients
Box-Shadow Generator
Adjust box-shadow visually and generate CSS
Flexbox Playground
Visually debug Flexbox layout properties
Meta Tag Generator
Generate SEO + Open Graph + social media meta tags
Password Strength
Assess password strength with crack-time estimate and tips
Color Converter
Convert between HEX / RGB / HSL with CSS preview
JSON Validator
Validate JSON syntax, highlight errors and give fixes
Unicode Codec
Convert between text and \uXXXX / U+XXXX encodings
Hello World Generator
Generate Hello World code in 30+ programming languages
URL Parser
Parse URL structure: protocol / host / path / query / anchor
SQL Index Advisor
Analyze SQL queries and suggest indexes
Connection Pool Calc
Optimal pool size from concurrency and database spec
EXPLAIN Analyzer
Paste EXPLAIN output, flag performance issues automatically
Table Size Estimator
Estimate table disk usage from schema and row count
SQL Migration Generator
Generate ALTER / CREATE migration scripts