Image ConverterPNG, JPG and WebP for free
The free tier converts between PNG, JPG and WebP with no cap on how many files or how many conversions. There is one limit: 5 MB per file. Pro raises it to 50 MB and adds AVIF and TIFF.
Your files stay on your machine
An image converter that runs inside your browser
Drop an image in, pick a format, click Convert. PNG, JPG and WebP are encoded by the browser itself, so no file is ever sent anywhere.
Free, no sign-up. The only permission the extension asks for is storage.
Chrome extensions install on desktop only. Open this page in Chrome on a computer to add the converter.
Works offlineBatch conversionZero uploads
Image Converter
photo.png
Convert to:
Quality92%
Conversion result
Total files: 1
photo_converted.webp
This is the extension. Click the drop zone to walk through it.
What the image converter does
Three things people install it for.
Batch processing
Drop several images at once. The extension shows progress for each one, collects the results in a single list, and downloads whichever ones you tick.
Your computer does the work
Conversion runs through OffscreenCanvas in the browser. AVIF uses a WebAssembly encoder bundled inside the extension, TIFF a JavaScript one. There is no server anywhere in that chain.
How to convert an image
Three clicks from file to result.
Drop your files in
Open the extension and drag images onto the dashed area, or pick them from the file dialog. You can keep adding files on top of the ones already queued.
Choose format and quality
Click the tile for the format you want and nudge the quality slider if you like. Out of the box the extension converts to WebP at 92% quality.
Download the result
The extension shows the old and new size of every file and how much it saved. Tick the ones you want and download them: they land in your normal downloads folder.
What happens to your images
Nothing happens to your images outside your own computer. A file is read into memory, converted by the browser, and handed back to you as a download link. There is no code in the extension that would send an image to a server.
The extension holds exactly one permission: storage, so it can remember your settings and your licence. It requests no host permissions, which leaves it no technical way to transmit anything. It does not ask for downloads either: converted files are saved through an ordinary download link, the same way any web page offers you a file.
The only network request in the whole extension is the Pro licence check against sovrest.com. If you never activate Pro, the extension makes no network requests at all. The full text is in the privacy policy.
- No uploads: not the file contents, not even the filenames
- No cookies, no analytics, no tracking pixels, no third-party SDKs
- One permission,
storage. No access to the pages you have open - No account: no email, no password, no sign-in, on Free or on Pro
- Ads on the free tier are two Sovrest slots of our own, not an ad network
- Settings and licence live locally and go away when you uninstall
Free and Pro
One extension, two tiers. Pro is unlocked with a licence key, and still needs no account.
| Feature | Free | Pro |
|---|---|---|
| Conversions | Unlimited | Unlimited |
| Maximum file size | 5 MB | 50 MB |
| Output formats | PNG, JPG, WebP | PNG, JPG, WebP, AVIF, TIFF |
| Batch conversion | yes | yes |
| Quality, resize, filename templates | yes | yes |
| Runs on your own machine | yes | yes |
| Ads in the extension window | Two Sovrest slots | no |
| Account | Not needed | Not needed |
| Devices per licence | No licence needed | 3, or 5 on lifetime |
Pro starts at 149 rubles per month. Three plans: monthly, yearly and lifetime. All three unlock the same features and differ only in duration and device count. The licence is checked online but keeps working for up to 14 days without a connection.
Get Pro at sovrest.comFrequently asked questions
Limits, privacy and formats, briefly.
Is the image converter free?
Yes, free and with no sign-up. The free tier puts no cap on conversions, handles PNG, JPG and WebP, and imposes exactly one limit: 5 MB per file.
The free window shows two Sovrest slots of our own, a link to our Telegram channel and a Pro offer, taking turns. Pro starts at 149 rubles per month, raises the limit to 50 MB, adds AVIF and TIFF, and removes those slots.
Are my images uploaded to a server?
No. Conversion runs entirely in your browser through OffscreenCanvas, and AVIF and TIFF are handled by encoders bundled inside the extension itself. The extension requests no access to websites, so it has nothing to send a file with.
The only network request it ever makes is the Pro licence check against sovrest.com. Without an activated licence it never touches the network, and that is easy to verify: open the Network panel in developer tools and convert a file.
Which browsers does it work in?
Chrome, and other Chromium browsers that can install from the Chrome Web Store, such as Microsoft Edge, Opera and Yandex Browser. It runs on Windows, macOS, Linux and ChromeOS.
It does not work on phones: mobile Chrome has no extensions at all. There is no Firefox or Safari build either, since the extension is published only on the Chrome Web Store.
Which formats does the converter support?
On output: PNG, JPG and WebP on the free tier, plus AVIF and TIFF on Pro. Those are exactly the formats the extension can genuinely encode.
GIF, BMP, ICO and SVG are missing from the output list on purpose. The browser cannot encode them in a canvas: ask it for a GIF and you get a plain PNG wearing the wrong file extension. We would rather drop those formats than pretend they work.
What is the maximum file size?
5 MB per file on the free tier and 50 MB on Pro. Neither tier caps how many files you queue or how many conversions you run: the only limit is the size of a single file.
A file that exceeds the limit is flagged in the list with its actual size, so you can see exactly how far over it is.
Do I need an account or a subscription?
No. Neither the free tier nor Pro needs an account: no email, no password, no sign-in. Pro is activated with a licence key that you paste straight into the extension window.
There are three plans: monthly, yearly and lifetime. They unlock the same set of features and differ only in duration and in how many devices can be active at once: three, or five on lifetime.
How do I disable or remove the extension?
Open chrome://extensions, find Image Converter by Sovrest and click Remove, or flip the toggle if you only want to switch it off for a while. Everything it stored locally, licence included, goes with it.
If you are removing it while a Pro licence is active, deactivate the licence inside the extension first: that frees the device slot. Activation records can be deleted on request by writing to info@sovrest.com.
Does it keep EXIF data and aspect ratio?
EXIF is not carried into the converted file: the browser re-encodes the pixels and the metadata is dropped along the way. Your original file is left alone, so the camera data is still in it. Aspect ratio is always preserved: if you set a maximum width, images are scaled down proportionally rather than stretched.
Settings also hold your default format and quality and the filename template: add a suffix, replace the extension, or use a prefix of your own. By default photo.png becomes photo_converted.webp.
Install it and check for yourself
Installing takes seconds and needs no account. Open the Network panel in developer tools and watch a conversion go by without a single request.
Add to Chrome