Change the format,
not the trust model.
Drop in one image or fifty. Pick the format you want out, adjust the quality if it matters, and take the results away. The conversion uses the same image engine your browser already uses to display pictures, so it happens on your machine and the originals never leave it.
Only applies to lossy formats (JPG, WebP, AVIF). Higher means a bigger file.
Longest side, in pixels. Images smaller than this are left alone.
JPG cannot store transparency. Transparent areas are filled with this colour.
AVIF gives the smallest files but takes noticeably longer to write, and older browsers cannot read it.
A conventional online converter takes your file, puts it on someone else's disk, does the work there and lets you download the result. Two copies of your file then exist somewhere you cannot see, for as long as that company decides. Here the code that does the work is shipped to your browser instead of your file being shipped to a server: the bytes are read by this tab, transformed in memory, and written back out as a download. Our server never sees them, so there is nothing for us to keep, log or lose.
One thing is counted, and here it is: when a tool finishes, this page tells the server which tool ran and whether it worked — never the file, its name, its size or anything read out of it, none of which ever leaves this tab. It is how we know which tools are worth keeping. The record is the same kind we keep for a one-time link: a truncated IP address, a country and a region.
Once the page has loaded, these tools keep working with the network switched off. That is the simplest proof that nothing is being sent anywhere.
Frequently Asked Questions
Q: Are my images uploaded?
No. Each image is decoded, redrawn and re-encoded by this browser tab using the canvas API. Nothing is sent to our server, which is also why the tool keeps working with the network off.
Q: Which conversions are supported?
Anything your browser can open — JPG, PNG, WebP, GIF, BMP, AVIF, SVG — converted to JPG, PNG or WebP, plus AVIF on browsers that can write it. The list of output formats below is built by asking your browser what it actually supports, so it never offers something that would fail.
Q: Why is my converted file sometimes bigger?
Re-encoding an already-compressed image at a high quality setting can cost more bytes than the original spent. Lower the quality slider, or convert to WebP, which is usually the smallest of the widely-supported formats.
Q: What happens to EXIF data and location?
It is dropped. The image is redrawn onto a blank canvas, so camera details, timestamps and GPS coordinates do not survive the conversion. Orientation is applied first, so photos come out the right way up.
Q: Can I convert several at once?
Yes. Drop in as many as you like; they are converted one after another and can be downloaded individually or together as a ZIP file built in the browser.
The same idea, applied to sending things rather than changing them.