Developer Tools
Free online tools to help with your everyday development tasks.
Formatters
Encoders & Decoders
Converters
JSON ↔ YAML
Convert between JSON and YAML formats.
JSON ↔ CSV
Convert between JSON and CSV formats.
Number Base Converter
Convert between Hex, Decimal, Binary, Octal.
Unix Timestamp
Convert between dates and Unix timestamps.
Case Converter
Convert text to camelCase, snake_case, etc.
JSON to TypeScript
Generate TypeScript interfaces from JSON.
JSON Schema Generator
Generate JSON Schema from sample data.
SQL to JSON
Convert SQL CREATE/INSERT to JSON.
Text to HTML
Convert plain text to HTML with auto-detection.
Generators
UUID Generator
Generate UUID/GUID values.
Hash Generator
Generate MD5, SHA1, SHA256, SHA512 hashes.
Password Generator
Generate secure random passwords.
Lorem Ipsum
Generate placeholder text.
QR Code Generator
Generate QR codes from text or URLs.
Slug Generator
Convert text to URL-friendly slugs.
Meta Tag Generator
Generate SEO meta and Open Graph tags.
Placeholder Image
Generate placeholder images with custom size.
HTML Table Generator
Generate HTML table code with styling options.
robots.txt Generator
Generate robots.txt for search engine control.
.htaccess Generator
Generate Apache .htaccess rules.
Mock Data Generator
Generate realistic fake data for testing.
README Generator
Generate professional README.md files.
Testers & Inspectors
RegEx Tester
Test regular expressions with highlighting.
Text Diff
Compare two texts and see differences.
Markdown Preview
Preview Markdown with live rendering.
String Inspector
Analyze text: char count, word count, etc.
JSON Path Evaluator
Evaluate JSONPath expressions against data.
CSV Viewer
View CSV data as a sortable table.
JSON Tree Viewer
Visualize JSON as an interactive tree.
Live Code Preview
Online code editors and compilers.
SVG Preview
Preview and optimize SVG code.
JSON Compare
Compare two JSON objects and see diffs.
Responsive Tester
Test URLs at different screen widths.
CSS Visual Tools
Gradient Generator
Create CSS gradients visually with presets.
Box Shadow Generator
Create CSS box shadows with live preview.
Flexbox Playground
Experiment with Flexbox properties visually.
Grid Generator
Create CSS Grid layouts visually.
CSS Unit Converter
Convert between px, rem, em, pt, vw, vh.
Border Radius
Create CSS border-radius visually.
Text Shadow
Create CSS text-shadow with live preview.
Animation Generator
Create CSS keyframe animations visually.
Filter Generator
Apply CSS filter effects with live preview.
Transform Generator
Create CSS transform effects visually.
Clip Path Generator
Create CSS clip-path shapes visually.
Multi-Column
Create CSS multi-column layouts visually.
Colors
Text Utilities
Line Sort/Dedupe
Sort lines and remove duplicates.
Escape/Unescape
Escape or unescape special characters.
URL Parser
Parse and analyze URL components.
Word Counter
Count words, characters, and reading time.
Emoji Picker
Browse, search, and copy emojis.
Encoding Detector
Analyze text encoding and byte representation.
Dev Utilities
Cron Parser
Parse cron expressions with next run times.
Chmod Calculator
Calculate Unix file permissions.
HTTP Status Codes
Searchable HTTP status code reference.
MIME Type Lookup
Search MIME types by file extension.
Aspect Ratio Calculator
Calculate and convert aspect ratios.
Social Share Preview
Preview social media share cards.
Font Preview
Preview web-safe and Google Fonts.
Image Converter
Convert images between PNG, JPEG, WebP.
CSS/JS Minifier
Minify CSS or JS with compression stats.
Pixel Ruler
Visualize pixel spacing scales.
Device Mockup
Place screenshots in device frames.
