Compress & optimise

Compress an image to 50 KB

Fifty kilobytes is the usual ceiling for the photograph on an online application. A passport-size photo fits under it at good quality, and this page does the fitting for you.

  • Runs in your browser
  • Nothing is uploaded
  • No sign-up
  • Batch up to 20 images

Drag & drop your image here

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JPG · PNG · WebP · GIF · BMP · AVIF · SVG  ·  up to 50 MB each · up to 20 files

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How to use the 50 KB image compressor

The target is preset to 50 KB with JPG output, so add your photo and download. A passport-size photo of 413 × 531 pixels fits at about quality 75 to 80 without being resized. Bigger photos are compressed further and scaled down if necessary.

  1. Add the photoIdeally already cropped to the size the form specifies.
  2. Let it searchThe target is preset to 50 KB and the output to JPG.
  3. Download and uploadThe result is just under the limit, ready for the form.

About this tool

Online applications for passports, visas, exams and jobs commonly cap the applicant's photograph at 50 KB. The number makes sense once you do the sum: a passport-size photo at print resolution is 413 × 531 pixels, and a JPG of that size comes in under 50 KB at a quality that still looks clean.

A photo straight from a phone is dozens of times too large for that limit, in pixels as well as bytes. This page searches the encoder quality for the best JPG under 50 KB and scales the picture down when it has to. For the cleanest result, crop the photo to the size the form asks for first, then bring it under the limit here.

What you get

  • Target preset to 50 KB, with JPG output
  • Keeps a passport-size photo at its full pixel dimensions
  • Lowers quality first and scales only as a last resort
  • Reports the quality and scale that were used
  • Batch up to 20 photos against the same limit

When to use the 50 KB image compressor

Passport and visa applications

Online passport and visa forms commonly limit the uploaded photograph to 50 KB.

Exam and admission forms

Entrance exams and university admissions ask for a recent photo within a narrow size range that tops out around 50 KB.

Job portals and HR systems

Recruitment sites store a small profile photo with each application and keep it under a tight limit.

ID card and membership photos

Clubs, libraries and employers that print ID cards want a small portrait file they can drop into a template.

How it works

A passport-size photo printed at 300 DPI is 413 × 531 pixels, or about 219,000 pixels in all. Spread 50 KB across them and each pixel gets roughly 0.23 bytes, which is close to what a JPG uses at quality 75 to 80. That is why a correctly sized photo passes the limit looking clean, while the same face in a 12-megapixel original cannot.

Each step of the search halves the range of qualities still in play, so after eight steps the answer is pinned down to within about one and a half quality points. In practice the file comes out a few percent under 50 KB. It cannot be made to land exactly on the number, because the encoder decides the size only after it has compressed the picture.

Common problems and how to fix them

The face looks soft or blotchy
The photo was much larger than the limit allows, so it was compressed hard. Crop it to the head and shoulders and resize it to the form's pixel size first. The Passport Photo Cropper does both.
The form says the photo is too small
Some forms set a minimum, such as 20 KB. A photo normally lands just under 50 KB, well above that. If yours came out tiny, the image itself is very small; start from a larger original.
The background turned white
Your original had transparent areas, and JPG cannot store transparency. Pick a different fill colour with the background control, or choose PNG or WebP as the output format if the form accepts them.
The dimensions changed
No quality setting could bring that many pixels under 50 KB, so the image was scaled down. Turn off "Scale the image down if needed" to keep the size, and accept that the limit may not be met.

Frequently asked questions

How do I compress a photo to 50 KB?

Add it above. The target is preset to 50 KB, so the tool finds the highest JPG quality that fits and hands back a file just under the limit.

Will a passport-size photo fit in 50 KB?

Yes. At 413 × 531 pixels, which is 35 × 45 mm at 300 DPI, a JPG under 50 KB works out to roughly quality 75 to 80, which looks clean. Make the photo that size with the Passport Photo Cropper, then compress it here.

The form asks for 20 KB to 50 KB. Is the result in that range?

For a photograph, yes. The tool keeps the largest result that fits under 50 KB, so a photo lands a little below the limit. Only a very small or very plain image can fall under 20 KB.

Does it change the dimensions of my photo?

Only if it must. Quality is lowered first. If the lowest usable quality is still over 50 KB, the image is scaled down and the search repeats. The scale used is shown with the result, and you can switch scaling off.

What pixel size fits in 50 KB?

For a typical photo, about 490 × 370 pixels at high quality and about 700 × 520 with moderate compression. A passport-size photo of 413 × 531 pixels sits comfortably inside that.

Can I compress a PNG to 50 KB?

Yes, but the result is a JPG by default, because that is what forms accept and what suits photographs. To keep the file as a PNG, change the output format; the tool then reduces the number of colours instead, which works for logos and flat graphics but not for photos.

Can I do a whole batch of photos at 50 KB?

Yes. Add up to 20 photos and press "Process all images". Each is searched on its own, so every file ends up under 50 KB whatever size it started at.

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