Convert Images Without Uploading — Free & Private
Convert between PNG, JPG, WebP, AVIF, GIF and BMP — entirely in your browser. Your files never touch a server.
No Upload Ever
Canvas API runs in your browser tab. Zero server transmission.
6 Formats Supported
PNG, JPG, WebP, AVIF, GIF, BMP — any to any.
Instant & Batch
Convert dozens of images at once, download as ZIP.
Why "no upload" matters for image conversion
Most online image converters — Convertio, CloudConvert, ILoveIMG — upload your image to their server, convert it, and send it back. That works, but your image passes through infrastructure you don't control.
For personal photos, medical images, scanned documents, or anything confidential, this is a real concern. Our converter uses the browser's Canvas API to do everything locally — your images never leave your device.
How we compare
| Service | Files uploaded? | Free? |
|---|---|---|
| 365tools (this site) | Never | Always free |
| Convertio | Yes — to their servers | Limited (10 conversions/day free) |
| CloudConvert | Yes — to their servers | 25 free conversions/day |
| ILoveIMG | Yes — to their servers | Limited |
Frequently asked questions
How does browser-based image conversion work without uploading?
The tool uses the browser's built-in Canvas API to read your image file directly from your device's memory, render it onto an off-screen canvas, and export it in the target format — all without sending any data over the internet.
Which image formats can I convert without uploading?
PNG, JPG/JPEG, WebP, AVIF, GIF, and BMP. You can convert between any combination of these six formats entirely in your browser.
Is this safe for sensitive or private images?
Yes. Because no data leaves your device, the tool is safe for sensitive photos, medical images, confidential documents scanned as images, or anything else you would not want on a third-party server.
How does this compare to Convertio or CloudConvert?
Convertio and CloudConvert upload your files to their servers for conversion. Our tool processes everything locally in your browser — no upload, no account, no file stored anywhere.
Can I batch convert multiple images without uploading?
Yes. Upload multiple images at once and they are all converted locally with the same format and quality settings. Download individually or as a ZIP archive.