Online converters for developers

Transform data between formats — YAML, JSON, CSV, XML, Markdown, color spaces, number bases, units. All run in your browser, nothing uploaded.

// 10tools in this category
timestamp converternew
unix ↔ date, iso 8601, utc, relative
yaml ↔ jsonnew
two-way converter with comments preserved
csv ↔ jsonnew
convert csv to json and back, auto-detect delimiter
xml ↔ jsonnew
parse xml into json and back
json → typescriptnew
generate typescript interfaces from json
markdown → htmlnew
render with github-flavor extensions
unit converternew
length, weight, temperature, data
color converternew
hex, rgb, hsl, oklch, lab
number base converternew
decimal, binary, octal, hex and any custom base
.env ↔ jsonnew
convert .env files to json and back
// about

Conversion tools are the workhorses of a developer toolkit. Whether you are reformatting an API response, adapting config files between ecosystems, or translating measurement units in documentation, these tools handle the transformation without a round-trip to a server. Every tool parses input on every keystroke and shows the converted output instantly.

// common use cases
  • Convert YAML API responses to JSON for programmatic processing
  • Transform CSV exports into JSON arrays for JavaScript applications
  • Convert Markdown documentation to HTML for embedding in a CMS
  • Convert hex color values to HSL for CSS custom properties
// faq
Are there any file size limits?
No hard limit. All conversions happen in your browser's memory. The practical limit is the RAM your browser tab can allocate — typically several hundred MB.
Does converted data leave my browser?
No. Every tool processes data using your browser's JavaScript engine. No network requests are made during conversion.
What happens with invalid input?
Each tool validates input and shows an inline error. The output is only updated when the input can be successfully parsed.
// other categories
format5encode9generate4text7java10network2image2data6
// history
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