10 Free Data Converters
JSON to CSV, Base64, Timestamps & More
Convert JSON to CSV, encode and decode Base64, transform Unix timestamps, switch between color formats, and calculate CSS units. Fast, browser-based data converters with no file uploads.
Converters
Color Format Converter
Convert between HEX, RGB, HSL, HSV, and CMYK color formats instantly. Perfect for designers and developers working with colors.
CSS Unit Converter
Convert px, rem, em, pt, pc, in, cm, mm, vw, vh, vmin, vmax, ch, ex - all results in one click. Custom base font, viewport dimensions, formula hints, and instant copy.
CSV to JSON Converter
Convert CSV spreadsheets to JSON format instantly. Perfect for API integration, data processing, and web development.
Image to Base64 Data URI
Convert up to 10 images at once to Data URI, HTML img, CSS bg, Favicon, JSON, Markdown, or plain Base64. Fetch remote images by URL. Decode any Base64 or Data URI back to an image.
JSON to CSV Converter
Convert JSON to CSV online - handles nested objects and auto-detects columns. Bidirectional: convert CSV back to JSON too. Free, instant download, no sign-up.
JSON to YAML Converter
Convert JSON to clean, readable YAML instantly. Perfect for Kubernetes configs, Docker Compose files, and CI/CD pipelines.
Timestamp Converter
Convert Unix timestamps to human-readable dates, dates back to timestamps, and break down any duration - with timezone support, auto-unit detection, and 8 output formats.
URL Encoder/Decoder
Encode or decode URLs instantly. Full-component mode, recursive decode, each-line batch, uppercase hex, smart paste, and a live URL breakdown panel with editable query params.
XML to JSON Converter
Convert XML data to JSON format instantly. Perfect for API integration, data transformation, and modern web development.
YAML to JSON Converter
Convert YAML to JSON instantly. Perfect for configuration files, CI/CD pipelines, and API development.
10 Free Data Converters with Instant Results
All 10 converters run instantly in your browser with no file size limits and no data sent to any server. They handle the format transformations that come up constantly in development and data work -- small tasks that should not require a script or a library to solve.
The JSON to CSV Converter turns API responses and JSON data into spreadsheet-ready files you can open in Excel or Google Sheets. The CSV to JSON Converter goes the other direction, bringing tabular data into a format your JavaScript or backend can consume. The JSON to YAML and YAML to JSON tools switch between the two config formats used everywhere in DevOps, Kubernetes, and CI/CD pipelines. The XML to JSON Converter handles legacy API responses and configuration files that still come in XML format.
The Timestamp Converter turns Unix timestamps (in seconds or milliseconds) into readable dates and times in both UTC and your local timezone -- and back again. The Color Format Converter switches between 12 color notations -- HEX, RGB, HSL, HSV, HWB, CMYK, oklch, oklab, and more -- with luminance info and ready-to-copy CSS snippets. The CSS Unit Converter calculates px to rem, em, vh, and vw values based on your base font size. The Image to Base64 URI tool encodes any image as a Base64 data URL for embedding directly in CSS or HTML.
The URL Encoder/Decoder makes query parameters safe for use in URLs by encoding special characters, and decodes garbled strings from redirects or API logs. Every converter updates in real time and includes a one-click copy button on the output.
All tools run entirely in your browser. No files are uploaded to our server.
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Frequently Asked Questions
Everything you need to know
Our converters support JSON to CSV, CSV to JSON, Base64 encode/decode, Unix timestamp to human-readable date, HEX to RGB, RGB to HSL, px to rem, and URL encode/decode.
No server-side limits. All conversions happen in your browser, so the only limit is your device's memory. Most tools handle large files (several MB) without issues.
Paste the Unix timestamp (in seconds or milliseconds) into our Timestamp Converter. It instantly shows the human-readable date and time in your local timezone and UTC.
Yes -- and much more. The Color Format Converter supports 12 formats: HEX, RGB, HSL, HSV, HWB, CMYK, oklch, oklab, decimal, and web-safe color. Enter any color in any of those formats and instantly get all 12 equivalents with one-click copy. It also shows the luminance value and CSS snippet for each format.
JSON is common in APIs and databases, but spreadsheet tools like Excel and Google Sheets use CSV. Our JSON to CSV converter makes it easy to export API data for reporting or data analysis.
Use the CSS Unit Converter. Enter your pixel value and your base font size (usually 16px by default in browsers). The tool calculates the rem equivalent, plus em, vh, and vw values. For example, 24px with a 16px base becomes 1.5rem. Using rem for font sizes and spacing makes your layout scale correctly when users change their browser default font size.
Paste your XML string into the XML to JSON Converter. It parses the XML structure and outputs equivalent JSON, preserving attributes and nested elements. Useful when working with older APIs that return XML responses, or when migrating config files from XML-based systems to JSON-based ones.
YAML is more human-readable than JSON for configuration files because it does not require quotes or curly braces. Most DevOps tools (Docker Compose, Kubernetes, GitHub Actions, Ansible) use YAML for config files. Use the JSON to YAML converter when moving API response data into a config file, or when a tool requires YAML input.
Use the Image to Base64 URI tool. Upload up to 10 images at once and it generates a Base64 data URI for each one. Choose from 7 output formats: plain Base64, Data URI, HTML img tag, CSS background-image, Favicon link tag, JSON, or Markdown. Copy the output directly into your stylesheet or HTML -- no separate image file or server request needed. The tool also shows image dimensions and the overhead size added by Base64 encoding.
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