Converters
Units, data formats, image formats and dates.
5 free tools · nothing is uploaded
About Converters
Conversion is the most common reason people search for a tool at all, and the most common reason they end up on a page covered in ads for one number. These are deliberately plain: enter a value, read the result, close the tab.
They also work offline once loaded, which is genuinely useful for the unit converter — the moment you need to convert inches to centimetres is often the moment you are standing in a shop with bad signal.
What are you converting?
- Physical units
- The Unit Converter covers length, weight, temperature, area, volume and speed, in both metric and imperial.
- Tabular data
- CSV to JSON turns a spreadsheet export into JSON for an API or a script. It handles quoted fields and embedded commas, which is where naive splitting on commas falls apart.
- Vector to raster
- SVG to PNG renders an SVG at whatever pixel size you need, for the many platforms that still will not accept SVG.
- Screen and print dimensions
- The Aspect Ratio Calculator works out the missing side when you know the ratio and one dimension — the usual case being video and social media sizes.
- Dates
- The Age Calculator gives an exact age or the precise difference between two dates in years, months and days.
For anything image-related, pair these with the image tools: SVG to PNG gives you the raster, and the Image Resizer or Compressor gets it to the size the destination actually accepts.
Frequently asked
Are my files uploaded when converting?
No. Conversion runs in the browser, so the file is read locally and written back locally. Nothing carrying your data is sent anywhere.
How accurate are the unit conversions?
They use exact standard factors where one exists — an inch is exactly 25.4 mm, for instance — and full floating-point precision elsewhere. The display rounds for readability; the underlying number does not.
Can I convert a large CSV file?
Yes, within your device's memory. The whole file is parsed in the browser, so a few megabytes is comfortable and a very large export is happier split into parts first.
Why does my converted SVG look blurry as a PNG?
An SVG has no fixed resolution, so the export size decides the detail. Choose dimensions at least as large as where the image will be displayed, and double them for high-density screens.