How do I compress a photo to exactly 100KB?

Upload the photo, type 100 in the target size box and press compress. The tool searches for the highest image quality that still fits under 100KB, so the result is as close to the limit as possible without exceeding it.

Are my photos uploaded to a server?

No. The image is decoded and re-encoded by your own browser using the HTML canvas API. It is never transmitted, which is why the tool still works with your internet disconnected.

Why can't my image reach a very small target?

Below a certain size, quality reduction alone is not enough. The tool then progressively reduces the pixel dimensions as well. If a target is still unreachable it will tell you the smallest size it managed and you can lower the resolution further.

Compress Image to an Exact KB Size

Need a photo under 50KB for a job portal, or exactly 100KB for a university form? Set the target and this finds the best quality that still fits. Your image is processed by your own browser and never uploaded.

Nothing leaves your device

Choose an image or drop it here

JPG, PNG, WebP, GIF or BMP · no size limit

Why an exact size matters

Plenty of forms in Pakistan and across South Asia reject anything over a fixed limit — a passport photo under 50KB, a scanned document under 200KB, a profile picture under 1MB. Most compressors just apply a quality slider and leave you guessing. This one works the other way round: you name the size, and it searches for the highest quality that fits underneath it.

How the search works

JPEG and WebP quality settings do not map linearly to file size, and the relationship differs for every image. So rather than guessing, the tool runs a binary search: it encodes the image at a mid-range quality, checks the resulting byte count, and narrows the range from there. About ten passes are enough to land within a fraction of a percent of the ceiling.

If the target is so small that even the lowest usable quality overshoots — common when you ask for 20KB from a 12-megapixel photo — the tool starts scaling the pixel dimensions down in steps and repeats the search at each size. That is what the "reduce dimensions" option controls.

A note on PNG

PNG is lossless, so it has no quality dial to turn. For a PNG target the tool can only reduce dimensions. If you need a small file and do not need transparency, JPEG will get you much further.

Frequently asked questions

Is there a watermark or a file limit?

Neither. There is no server to impose limits and no business model that requires a watermark. Process as many images as you like.

Does it work offline?

Once the page has loaded, yes. Turn off your connection and compress away — the work happens in your browser's canvas engine, not on a server.

Will compressing hurt the photo?

JPEG and WebP are lossy, so some detail is discarded. Because the tool always picks the highest quality that fits your target, the loss is the minimum needed to meet the limit you set. Compare the two previews before downloading.

Does it keep EXIF data such as location?

No. Re-encoding through the canvas drops EXIF metadata, including GPS coordinates and camera details. For uploading photographs to public forms, that is usually an advantage.