Resize image to 400 KB

Where a 400 KB limit shows up

• High-resolution certificate scans
• Tender and contract document pages
• Portfolio and work sample uploads

Tips for a clean 400 KB file

• •If you are uploading over mobile data on a weak connection, a 400 KB file is far more likely to finish than a 4 MB original.
• •Keep the original file. Some verification stages later ask for a higher-resolution copy of the same document.

Frequently asked questions

Will I notice any quality loss at 400 KB?

For a single page scan or a portrait, no. The output at 1000×1300 px is effectively indistinguishable from the original on screen.

Why compress at all if my form allows 2 MB?

Speed and reliability. Large uploads time out on unstable connections, and many portals silently fail rather than showing an error.

Is my image uploaded to a server?

No. ShantiTools compresses the image entirely inside your browser — the file never leaves your device.

Common mistakes

• •Uploading a screenshot — screenshots are already compressed and often produce blocky JPEGs. Use the original photo instead.
• •Ignoring dimensions — a file can be the right KB but the wrong shape. This page sets 1000×1300 px automatically.
• •Cropping too tightly — leave a small margin around the head and shoulders so the form does not cut the face.
• •Wrong background — busy backgrounds eat KB and can get rejected. Plain white or light works best.

Troubleshooting

The result is still too big

Start with a smaller source file or crop closer to the face. If the form allows a smaller size, try 300 KB.

The result is too small

The source image may be very low resolution. Upload a larger original photo and retry.

My form rejected the upload

Double-check both the KB limit and the pixel dimensions in the form. Some forms also require exact aspect ratios (e.g. 3.5×4.5 cm).

Other sizes