How to Reduce a Photo to 100 KB, 50 KB or 20 KB for Forms

Visa applications, exam registrations, job portals and government websites love strict limits: “Photo must be JPG, under 100 KB.” A phone photo is usually 2–5 MB — twenty to fifty times too big. Here’s how to get it under the limit while keeping it sharp enough to be accepted.

What decides the size of an image file

Two things matter most:

1. Dimensions — how many pixels the image has. A 4000 × 3000 photo has 12 million pixels; a 600 × 800 passport-style photo has under half a million.
2. Compression quality — how hard the JPG encoder squeezes those pixels. Lower quality means a smaller file, but go too far and you see blocky artefacts.

The trick is to balance the two. Shrinking the dimensions first is usually better than crushing the quality of a huge image.

The quick way

1. Open the right page: compress to 100 KB, 50 KB or 20 KB — or use Compress Image and type any size.
2. Drop in your photo (JPG, PNG, WebP or iPhone HEIC all work).
3. Download the result.

The tool tries the highest quality first and steps down only until the file fits. It reduces the dimensions only when quality alone isn’t enough. That way you always get the best image that is still under the limit.

Check the other requirements too

Forms that limit file size usually have other rules as well. Read them carefully — a photo under 100 KB will still be rejected if it breaks these:

• Exact dimensions in pixels, such as 600 × 600. Use Resize Image or crop to square first, then compress.
• Minimum size, such as “at least 20 KB”. Do not squeeze further than needed.
• File type — most portals want JPG. If you have PNG or HEIC, the compressor saves JPG for you.
• Background and framing rules for ID photos. Crop the image so your face is centred.

Common mistakes

• Screenshots of photos. Taking a screenshot of a picture adds borders, lowers quality and often makes the file bigger. Use the original.
• Compressing again and again. Each round of JPG compression loses a little detail. Start from the original every time.
• PNG for photos. PNG is lossless and great for logos and screenshots, but a photo saved as PNG is huge. Use JPG for photos.

Privacy matters for ID photos

ID photos and scanned documents are exactly the kind of files you don’t want sitting on a random server. FileCrafty compresses images inside your browser — nothing is uploaded, and the tool even works offline once the page has loaded.

Quick answer

Open compress image to 100 KB, drop your photo in and download. Resize or crop first if the form also asks for specific dimensions.