DevTools Pro

Free Online Developer Tools & PDF Utilities

Professional developer tools: JSON formatter, regex tester, base64 converter, color picker, diff checker, cron generator, cURL generator, SQL formatter. Plus PDF merge, split, compress tools. No registration required, 100% secure and private.

JSON FormatterRegex TesterBase64 ConverterColor PickerDiff CheckerCron GeneratorcURL GeneratorSQL FormatterPDF Tools
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Popular Developer Tools

JSON Formatter & Validator

Format, validate, and beautify JSON data. Perfect for API development, data processing, and debugging JSON responses.

  • • Syntax validation
  • • Pretty formatting
  • • Minification
  • • Error highlighting

Regex Tester & Debugger

Test regular expressions in real-time with live matching, highlighting, and comprehensive flag support.

  • • Real-time testing
  • • Match highlighting
  • • Flag explanations
  • • Common patterns

Base64 Encoder/Decoder

Encode text and files to Base64, decode Base64 back to original format. Essential for data transmission and storage.

  • • Text encoding
  • • File support
  • • Batch processing
  • • Download results

Color Picker & Generator

Professional color picker with palette generation, accessibility checking, and multiple color format support.

  • • Multiple formats (HEX, RGB, HSL)
  • • Palette generation
  • • Accessibility check
  • • Contrast ratios

Text Diff Checker

Compare text files and see differences with line-by-line highlighting. Perfect for code reviews and document comparison.

  • • Line-by-line comparison
  • • Visual highlighting
  • • Statistics
  • • Export options

Cron Expression Generator

Create and understand cron expressions with human-readable descriptions and next occurrence predictions.

  • • Quick presets
  • • Human descriptions
  • • Next occurrences
  • • Syntax help

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