Compress Image to 500KB

Half a megabyte of room: most pictures squeeze under it without giving up any width or height.

Files never leave your device. Everything is processed in your browser.

A 500KB ceiling turns up most often in bank recruitment, where IBPS and the RBI Services Board ask applicants to attach a 10th certificate or proof of age, category or qualification. Half a megabyte sounds like plenty, yet a document photographed on a phone often weighs 4 to 10MB, and the upload button simply refuses it.

With this much space the compressor rarely needs to make the picture smaller. It looks for the best JPG quality that weighs in under 500KB and keeps the original width and height whenever that is possible, so stamps, signatures and the fine print on a certificate stay as sharp as your photo was. Shrinking only kicks in for very large or very busy pictures.

Before and after

Before
A person’s hands lifting the lid of a slim laptop on a wooden desk in warm orange light

6000 × 4000 px1.65 MBJPG

After
The same photo compressed to 474 KB

4382 × 2921 px474 KBJPG

This photo was 1.65 MB. With the limit set to 500 KB, it came out at 474 KB, which is 72% smaller.

To fit, the tool also scaled the picture down from 6000 × 4000 px to 4382 × 2921 px.

The numbers are from a real run of the tool above. The pictures here are smaller previews of the actual files.

How to use it

  1. Lay the certificate on a dark, plain surface near a window and shoot straight down, so the edges of the paper are easy to crop away later.
  2. Add the photo or scan here. Phone formats such as HEIC are read directly, and compression to 500KB starts the moment the file loads.
  3. Look at the width and height on the result card: if they match the original, nothing was trimmed and only the quality was adjusted.
  4. Save the JPG, then turn it into a PDF if the upload field accepts only PDF, using the margin described below.

Where the 500 KB limit comes from

IBPS notifications for CRP PO/MT-XV, CRP CSA-XV and CRP SPL-XV (2025) and CRP RRBs XV (2026) ask for the SSC/SSLC/10th certificate as a PDF of up to 500 KB, A4 in size, scanned at a minimum of 200 dpi. RBI Services Board Advt. No. 04/2025-26 wants every other supporting document (age, category, disability, qualification and experience) as a PDF of 20 KB to 500 KB each, also from a scanner set to at least 200 dpi.

An A4 sheet at 200 dpi comes to about 1,654 × 2,339 pixels, close to 4 megapixels. A clean, evenly lit page of that size often fits in 500KB with little or no trimming, which is why this budget is kinder to documents than the 100KB or 200KB caps on other forms.

From a 500KB JPG to an accepted PDF

The output of this page is always a picture, never a PDF. Since both bank boards above want PDF, lower the number in the size box to around 450 before you compress. The extra 50KB is slack for the PDF wrapper that the Save as PDF or Print to PDF option on your phone or laptop adds; after saving, open the file details and confirm that the PDF itself reads under 500 KB.

For the RBI documents the 20 KB floor is seldom a problem, because an A4 page rarely compresses that far. A small cropped proof, such as a single stamp or a one-line letter, might. In that case tick “My form also has a minimum size”, enter 20, and the tool will raise the quality, or enlarge the image, until the file clears the floor.

Frequently asked questions

The IBPS form wants a PDF. Why compress a picture first?
Because the size of a one-page PDF is mostly the size of the picture inside it. Get the JPG to about 450KB here, save it as a PDF with your device, and the result normally lands under the 500 KB limit without any separate PDF compressor.
Is 500KB the same as 0.5MB?
Very nearly. This page treats 500KB as 512,000 bytes (1KB = 1,024 bytes), while some sites write 0.5MB to mean 500,000 bytes. The gap is only 12,000 bytes, so if a portal rejects a file that sits right at the limit, set the box to 480 and compress again.
Will my 12-megapixel photo keep its full resolution?
Often it will. Most phone pictures fit under 500KB by lowering the JPG quality alone. A very detailed scene, like a crowd or a field of grass, may be scaled down a little; the result card shows the final width and height so you can check.
I was asked for 500 × 500 pixels. Is that the same as 500KB?
No. 500KB is the weight of the file; 500 × 500 is its width and height in pixels. For a square of exactly that size use the resize tool, and expect the file to come out far lighter than 500KB.
Can I put two pages of a certificate into one 500KB file?
Yes. Stack both pages with the merge tool first, then compress the joined image here. Two A4 pages share the budget, so some shrinking is likely; zoom into the preview to make sure the smallest text is still readable.