Resize Image in KB

How the KB resizer works

Most online forms set a maximum file size rather than a quality level, so guessing a quality slider value in an app rarely hits the limit on the first try. This tool does the guessing for you. It saves your photo as a JPG at high quality, checks the size, then narrows in on the highest quality that still fits under your target. If even a low quality is too big, it gently reduces the pixel dimensions and tries again, so you never end up with a blocky face just to save a few bytes.

Why the result is slightly under your target

Some portals count 1 KB as 1,000 bytes and others as 1,024 bytes. A “20 KB” file of 20,400 bytes passes on one site and fails on another. To be safe, the tool keeps the file under the stricter 1,000-byte definition, so it passes everywhere. The exact byte count is shown under the result.

Tips for sharp results at small sizes

• Crop first. A photo of just your head and shoulders compresses far better than a full-length shot. Use our image cropper before resizing.
• Use a plain background. Busy walls and patterns waste bytes that should go to your face.
• Match the required dimensions. If the form also states pixels (for example 200 × 230), resize to those with the pixel resizer first.
• Avoid screenshots of photos. Start from the original camera file for the cleanest result.

Is my photo uploaded anywhere?

No. The resizing happens inside your browser using your phone or computer’s own processor. Your photo never reaches our servers, which matters when you are handling identity documents and signatures.

Common size limits

Government and exam portals commonly ask for photos between 20 KB and 50 KB and signatures between 10 KB and 20 KB, while scanned certificates often have a 100 KB–300 KB cap. For exam-specific dimensions and limits, try the exam photo and signature resizer, which applies the right preset automatically.