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Converters

Browse our free collection of converters. All tools run locally in your browser for maximum privacy.

3 Tools

Converters handle the translation layer between data formats, JSON to CSV, Base64 encoding, URL encoding, unit conversions, and color space transformations. Every time an API returns data in a format your spreadsheet can't read, or a design spec uses a color space your CSS doesn't support, a converter is the fastest path forward.

Common Workflows & Recommended Tools

01

Convert a JSON API export into a CSV for Excel stakeholders

→ JSON ↔ CSV Converter
02

Encode binary data as Base64 for embedding in JSON or CSS

→ Base64 Encoder
03

Encode a URL parameter safely per RFC 3986

→ URL Encoder/Decoder
04

Convert between metric and imperial units

→ Unit Converter
05

Convert HEX colors to RGB, HSL, or OKLCH for CSS

→ Color Picker

Common Mistakes to Avoid

  • ✗Using comma-delimited CSV parsing on European files that use semicolons, always check the delimiter before assuming the default.
  • ✗Letting auto-type coercion convert ZIP codes, ISBNs, or phone numbers into numbers, dropping leading zeros.
  • ✗Treating Base64 as encryption, it is encoding only. Anyone who intercepts Base64 data can decode it trivially.
  • ✗Converting colors in HSL and shipping without checking perceptual brightness, OKLCH keeps lightness consistent across hue rotations.

Privacy-First by Design

Data conversion often touches regulated payloads, financial records, healthcare data, or API responses containing PII. All converters run client-side, so sensitive data never leaves your browser for a third-party server.

Frequently Asked Questions

Are these converters safe for sensitive data?

Yes. All conversions happen locally in your browser. No data is uploaded to any server, making these tools safe for regulated payloads (PCI, HIPAA, GDPR).

What is the maximum file size these converters can handle?

Limits depend on your browser's available memory. Most converters handle files up to 100-500 MB comfortably on modern hardware.

Does the JSON to CSV converter preserve nested objects?

Nested objects are flattened to dot-notation columns (e.g., user.name, user.age). Arrays can be joined with a delimiter or exploded into separate rows.