Data & Dev
JSON, YAML, CSV, XML, SQL, regex, encoding, formatting, minifying, and dozens of developer utilities.
Free online data and developer tools for JSON, CSV, XML, YAML, SQL, regex, Base64, hashing, encoding, and dozens of other formats. Format, validate, transform, and convert data instantly — no signup, no rate limits, and no data ever sent to a server (most tools run client-side). The complete toolkit for working developers, data engineers, and analysts.
84 tools · always free · no account needed
CSV to JSON
Convert CSV spreadsheets to JSON
JSON to CSV
Convert JSON data to CSV format
XML to JSON
Convert XML documents to JSON
JSON to XML
Convert JSON data to XML format
YAML to JSON
Convert YAML configs to JSON
JSON to YAML
Convert JSON data to YAML format
JSON Formatter
Format, validate, and pretty-print JSON
CSV to Excel
Convert CSV files to Excel XLSX format
Base64 Encode/Decode
Encode and decode Base64 text and files
URL Encode/Decode
Encode and decode URL components
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-512 hashes
JWT Decoder
Decode and inspect JWT tokens
Regex Tester
Test regular expressions with live matching
Text Diff
Compare two texts and see differences highlighted
Lorem Ipsum
Generate placeholder dummy text
UUID Generator
Generate random UUID v4 identifiers
QR Code Generator
Generate QR codes from text or URLs
Cron Parser
Parse cron expressions and see next run times
SQL Formatter
Format and beautify SQL queries
Minify / Beautify
Minify or beautify JS, CSS, and HTML code
Excel to PDF
Convert Excel spreadsheets to PDF tables
Excel to CSV
Convert Excel XLSX files to CSV format
vCard to CSV
Convert VCF contact files to CSV spreadsheet
Excel to JSON
Convert Excel spreadsheets to JSON data
Text Compare
Compare texts with similarity percentage and highlighted matches
JSON Schema Generator
Auto-generate JSON Schema from JSON data
JSON to TypeScript
Generate TypeScript interfaces from JSON
XML Formatter
Pretty-print and validate XML documents
Markdown Table
Visual spreadsheet to Markdown table generator
Markdown Editor
Split-screen Markdown editor with live preview
HTML Entities
Encode and decode HTML entities
Curl to Fetch
Convert curl commands to JavaScript fetch
String Escape
Escape and unescape JSON, HTML, URL, JS strings
Mock Data Generator
Generate fake JSON, CSV, or SQL test data
TOML to JSON
Convert between TOML and JSON formats
SVG to CSS Background
Convert SVG to inline CSS background-image
Color Picker
Pick colors from screen with EyeDropper API
DOCX to Markdown
Convert Word documents to Markdown
Markdown to DOCX
Convert Markdown to Word document
iFrame Generator
Generate responsive iframe embed code
CSS Specificity
Calculate CSS selector specificity scores
PWA Manifest
Generate web app manifest.json
htaccess Generator
Generate Apache htaccess redirect rules
ASCII Art
Convert text to ASCII art banner
Random Data Generator
Generate random names, emails, addresses
JSON Schema Validator
Validate JSON data against a JSON Schema
Git Diff Viewer
Compare code blocks with colored diff output
Mock API Generator
Define mock API endpoints and generate specs
OpenAPI Generator
Build OpenAPI 3.0 specs from a form
HTTP Headers
Fetch a URL and inspect response headers
Code Screenshot
Create beautiful syntax-highlighted code images
JSONPath Tester
Test JSONPath queries against JSON data
JWT Builder
Build and sign JWT tokens
Webhook Tester
Receive and inspect live HTTP webhook calls
Regex Explainer
Explain regular expressions in plain language
cURL Builder
Build cURL commands with a visual GUI
API Rate Calculator
Calculate API rate limits per second/minute/hour
JSON Diff
Compare two JSON objects and see structural differences
CSV to Chart
Upload CSV and generate line, bar, pie, and scatter charts
Pivot Table
Create pivot tables from CSV with drag-and-drop columns
SQLite Viewer
Browse SQLite databases and run SQL queries in the browser
Parquet Viewer
View Apache Parquet file schema and data
User Agent Parser
Parse User-Agent strings into browser, OS, and device info
Cookie Viewer
View, edit, and manage browser cookies
LocalStorage Viewer
Browse and edit localStorage and sessionStorage
Regex Pattern Library
Searchable collection of 100+ pre-built, tested regex patterns
License Picker
Answer simple questions and get the right open source license
Badge Generator
Build shields.io-style badges for GitHub READMEs
JSON Tree Viewer
Visualize JSON as an interactive collapsible tree with path copying
Unicode Lookup
Search and browse the entire Unicode character set
Crontab Builder
Visually build cron expressions with dropdowns and presets
GitHub README Generator
Generate a beautiful GitHub profile README from a form
.env Editor
Visual editor for .env files with validation and formatting
HTML Table Generator
Build HTML tables visually without writing code
Nginx Config Generator
Generate nginx configuration files from a visual form
Dockerfile Generator
Generate optimized Dockerfiles from a visual form
Changelog Generator
Generate CHANGELOG.md files in Keep a Changelog format
CSV Cleaner
Upload a messy CSV, auto-detect problems, and clean it
JSON to Table
Convert a JSON array into a visual, sortable, filterable table
SQL to CSV
Extract data from SQL INSERT statements into CSV
Text to Diagram
Write text-based syntax and generate flowcharts and diagrams
Responsive Preview
Preview any URL or HTML on multiple device sizes simultaneously
Commit Message Generator
Generate Conventional Commits formatted commit messages from a form
Receipt Scanner
Extract vendor, date, total, and line items from receipt photos.
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