Compress an image to a size

How it works

• It tries the highest quality first and lowers it step by step until the image fits, so you keep as much detail as the limit allows.
• Only if even low quality is too big does it reduce the pixel dimensions, and it tells you when it did.
• It aims under the limit counted in thousands of bytes (50 KB = 50,000 bytes), so the result also fits sites that count a KB as 1,024 bytes.
• Location and camera data (EXIF) are removed; rotation is applied first, so photos stay upright.

Why it matters for ID photos and signatures

Most online compressors and converters work by uploading your file to their servers, processing it there and sending a copy back. While it's there, it's covered by their privacy policy and retention rules, not yours, and it may pass through other companies' storage and networks.

An ID photo with your name, or a scan of your signature, is exactly what identity thieves look for. It shouldn't sit on a stranger's server just because a form wanted it under 50 KB.

Before you upload

• Check the form's other rules too: many ask for exact pixel dimensions or a plain background, which no compressor can fix.
• Photo rules for passports and visas forbid editing: no filters or retouching. Reducing file size is what this tool does; keep the photo itself as it is.
• Open the result and zoom in: text in a signature or document should still be readable.

Check it yourself

1. Open Chrome's developer tools (Cmd+Option+I on a Mac, Ctrl+Shift+I on Windows) and choose the Network tab.
2. Use the tool on this page, or let the Krisox extension compress a file in any upload form.
3. No request carries your file: it's processed on your device. With the extension, the only upload is the website's own.