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All Tools33
Formatter & ValidatorMinifier
Base64 Encoder/DecoderURL Encoder/Decoder
Case ConverterWord CounterLorem Ipsum
UUID GeneratorHash GeneratorTailwind Theme
Unix TimestampNumber Base
Password Generator
CSS MinifierCode to ImageVim Cheat SheetLinux Cheat Sheet
Merge PDFSplit PDFImages to PDFPDF to ImagesRotate PDFPDF Metadata
CSV to JSONJSON to CSVCSV to SQLCSV to MarkdownDuplicate RemoverColumn SplitterEmail ValidatorPrompt RunnerTranslatorBulk Content Generator
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32 tools — runs locally, nothing stored

JSON

Formatter & ValidatorBeautify, indent and validate JSON with error highlighting.
Popular
MinifierStrip whitespace from JSON to reduce file size.

CSV Tools

CSV to JSONConvert CSV rows into a JSON array of objects.
JSON to CSVConvert a JSON array back into a CSV file.
CSV to SQLGenerate SQL INSERT statements from CSV data.
CSV to Markdown TableConvert CSV into a GitHub Markdown table.
Duplicate RemoverRemove duplicate rows based on selected columns.
Column SplitterSplit a delimited column into multiple columns.
Email ValidatorValidate email addresses in a CSV column.
Prompt RunnerRun a Claude AI prompt against every row.
AI
TranslatorTranslate selected columns using Claude AI.
AI
Bulk Content GeneratorGenerate AI content columns for every row.
AI

Encoding

Base64 Encoder / DecoderEncode or decode text and binary data to Base64.
Popular
URL Encoder / DecoderPercent-encode special characters in URLs.

Text Tools

Case ConverterSwitch between camelCase, snake_case, kebab-case and more.
Popular
Word CounterCount words, characters, sentences and reading time.
Lorem Ipsum GeneratorGenerate placeholder text for mockups.

Generators

UUID GeneratorGenerate cryptographically random UUID v4 identifiers.
Popular
Hash GeneratorCompute SHA-256, SHA-512 or SHA-1 hash of any text.

Converters

Unix TimestampConvert epoch timestamps to readable dates and back.
Number BaseConvert between decimal, binary, octal and hex.

Security

Password GeneratorGenerate strong random passwords with custom rules.
Popular

Developer

CSS MinifierStrip comments and whitespace from CSS.
Code to ImageConvert code snippets into beautiful shareable screenshots.
New
Vim Cheat SheetSearchable quick reference of the most-used Vim commands.
New
Linux Cheat SheetSearchable quick reference of the most-used Linux & Bash commands.
New

PDF Tools

Merge PDFCombine multiple PDFs into one document.
Popular
Split PDFExtract pages or ranges from a PDF.
Images to PDFConvert PNG/JPG/WebP images into a PDF.
PDF to ImagesExport each PDF page as a PNG or JPG.
Rotate PDFRotate pages individually or all at once.
PDF MetadataView and edit PDF metadata fields.
OneDevTools

30+ free developer tools. JSON, CSV, PDF, encoding, generators and more. All run locally in your browser — your data never leaves your device.

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Popular

  • JSON Formatter
  • Base64 Encoder
  • UUID Generator
  • Password Generator
  • Merge PDF
  • CSV to JSON
  • Case Converter
  • Hash Generator

More Tools

  • JSON Minifier
  • URL Encoder
  • Word Counter
  • Lorem Ipsum
  • Unix Timestamp
  • Number Base
  • CSS Minifier
  • Code to Image
  • Vim Cheat Sheet
  • Linux Cheat Sheet

PDF & CSV

  • Split PDF
  • Images to PDF
  • PDF to Images
  • Rotate PDF
  • PDF Metadata
  • CSV to SQL
  • CSV to Markdown
  • CSV Email Validator

AI Tools

  • CSV Prompt Runner
  • CSV Translator
  • Bulk Content Generator
  • Tailwind Theme Generator

Browse

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  • PDF Tools
  • CSV Tools

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