Compress any photo to an exact KB target – 20 KB, 50 KB, 100 KB or any size you need. Built for exam forms, job applications, visa portals and email limits. Free, instant and no signup.
Drag & drop your images here
or click to browse · JPG, JPEG, PNG & GIF · Up to 25 MB each · Max 10 files
Hit an exact KB limit in three simple steps.
Type the exact size in KB required by your form – for example 20 for exam boards or 50 for university portals – or tap a quick button.
Drag & drop your JPG, PNG or GIF. For small targets, setting a max width (like 600px) helps the tool reach the exact KB size faster.
The reducer automatically finds the best quality that fits your KB limit and downloads a photo that passes the form’s validation.
Most online forms do not care about pixels – they enforce a hard file-size limit in kilobytes. If your photo is even one KB above the limit, the upload fails. That is why a proper image KB size reducer is one of the most searched utilities on the web:
Reducing image size in KB is a math problem: find the best possible quality whose file fits under your limit. Our reducer solves it automatically. For JPG photos it first searches for the highest JPEG quality that stays under your KB target, keeping your original dimensions untouched. Only when quality alone cannot reach very small targets (like 20 KB) does it gently scale the image down – and it stops the moment the file fits, so nothing more is sacrificed than necessary.
The result: a photo that satisfies the form and still looks as good as physically possible at that size. You see the exact before-and-after KB values for every file, so you can trust the output before downloading it.
Tip: for very small targets, pick a resize option like 600px in the tool – a passport photo does not need 4000 pixels, and smaller dimensions let the reducer keep higher quality inside your KB budget.
For general compression without an exact limit, use the image file size reducer, the JPEG compressor, the PNG optimizer or the GIF size reducer.
Enter your target size in KB (for example 50), upload your photo and click "Compress Now". The tool automatically adjusts quality and dimensions until your image is at or under the exact KB limit you set, then you download it instantly.
Set the target to 20 or 50 in the box above (or tap one of the quick buttons), then upload your photo. This is exactly what exam boards, universities, visa applications and job portals ask for - and the KB size reducer hits the limit automatically.
Very small targets need smaller dimensions. Set "Resize large images" to 800px or lower and try again - a passport-style photo rarely needs more than 800px. The reducer always gets as close to your KB target as mathematically possible.
Only when it is necessary. The tool first lowers JPEG quality while keeping your original dimensions. Only if the target cannot be reached that way does it gradually shrink the image, and it stops as soon as your file fits under the KB limit.
JPG, JPEG, PNG and GIF. For photos we recommend JPG, because it reaches small KB targets with the best visible quality. You can compress up to 10 images at once, each to its own KB target.
Compress other formats with dedicated tools: