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Compress an image to 100 KB

Drop your photo, pick the size you need, and download a JPG (or WebP) under 100 KB. Everything happens in your browser.

Drop a photo here, or tap to choose

JPG · PNG · WEBP · HEIC — files never leave your browser

0 photos uploaded — ever.

All processing happens locally in your browser.

Many government portals, university applications, and online forms cap uploads at 100 KB. This tool finds the highest JPEG quality that still fits the limit using a binary search, then progressively scales the image only if it absolutely has to.

What needs a 100 KB photo?

100 KB is the most common upload limit on the web. DS-160, USCIS portals, many EU visa portals, university applications and a long list of national exam systems all enforce it. At passport dimensions the output is visually indistinguishable from the source.

How the compressor hits 100 KB

We binary-search the JPEG quality between 0.40 and 0.95 to find the highest setting whose encoded output fits under 100 KB. For most photos at typical document dimensions this lands within 1.5 KB of the target after 6–8 iterations. If quality 0.40 still overshoots, we progressively scale the canvas down by 10% and try again — the editor only ever reduces resolution as a last resort.

What if the output is still too big?

Reduce pixel dimensions. A 600×600 photo can never shrink to 100 KB as far as a 413×531 one can. Switch the size mode to a passport preset, or set custom pixel dimensions.
Switch format to WebP. WebP typically gives 25–35% smaller files at equivalent quality. Some upload portals reject it, so check the spec page first.
Crop tighter. Less background means less detail to encode, which lets the encoder use more bits on the face.

How to use this page

Drop your JPG, PNG, WebP or HEIC photo above.
Pick a size preset (passport, square avatar, custom pixels) — or leave it on "Free" to keep the original dimensions.
The target is already set to 100 KB. Click Generate and download.

Privacy

Every step happens inside the browser tab you have open. Your image is decoded, cropped and re-encoded by the same JavaScript engine that runs this page — there is no upload, no temporary file on a server, and no "processed copy" cached by us afterwards. When you close the tab, the blob is gone. We document the full pipeline on our Methodology and How it works pages.

FAQ

Why is my output above 100 KB?

Some images can't reach 100 KB without becoming unusable. Try a smaller pixel size or use WebP for better compression.

Does this work for passport photos?

Yes. Switch the size mode to Preset and choose a passport size, then keep the 100 KB target.

Does compressing to 100 KB blur the photo?

For a 413×531 px passport photo at 100 KB, the output is visually indistinguishable from the original on a phone or laptop screen. Below ~30 KB at the same dimensions you start to see mild softening; below ~15 KB JPEG block artifacts become visible.

Will the file be exactly under 100 KB?

The compressor stops the search at the first quality that fits, so the output is guaranteed to be ≤ 100 KB. You'll usually land 1–5 KB under the limit.

What happens to my image after I close the tab?

It is freed from your browser's memory like any other image you opened. We never received it, so we have nothing to delete on our side. See Trust & Safety for the full policy.