Compress Image to 150KB
Reduce JPG, PNG or WebP image size to 150KB or less with a real target-size workflow. Review the result before using it for an upload or form.
Smart target workflow
Compress to 150KB without guesswork
Batch up to 50 images, review the real output, then download images, ZIP or a combined PDF.
Compressing an image to 150 KB: what actually happens
On this page 150 KB means at most 150,000 bytes. That also passes a portal that counts 1 KB as 1,024 bytes (a limit of 153,600 bytes), so you do not have to know which definition the form uses.
Our 12-megapixel photo-style test image fitted under 150 KB at its full 4032 × 3024 pixels as a JPG (139.1 KB), so at this target the tool only lowers JPEG quality. That is 0.09 bits per pixel; at the 10 MB target the same image kept 2.58 bits per pixel, so zoom in on fine detail before you upload. Real camera photos with more texture than our test image need more bytes for the same pixel size.
Where a 150 KB limit comes from, and whether this page meets it
UPSC photograph
UPSC asks for the photograph as a JPG between 20 KB and 200 KB. 150 KB is comfortably inside that band and leaves room for portals that round sizes up. A 150 KB file from this page is inside that range.
US visa photo
The State Department allows square JPEGs of 600 × 600 to 1200 × 1200 pixels, up to 240 kB, compressed 20:1 or less. At 150 KB the 20:1 rule allows a square of about 1000 × 1000 pixels, so a 1000 × 1000 visa photo compressed to 150 KB meets every number on the page. A 150 KB file from this page is inside that range.
150 KB in numbers
Worked out from the byte limit, and from what this page produced with our test files.
| Measure | Value |
|---|---|
| Byte limit used by this page | 150,000 |
| Same limit if a site counts 1 KB = 1,024 bytes | 153,600 |
| Compression needed for a 12 MP photo kept at full size | about 244:1 (36.3 MB of raw pixels into 150 KB) |
| Largest uncompressed square that fits | 223 × 223 pixels |
| Our photo-style test image (4032 × 3024), JPG | 4032 × 3024, 139.1 KB |
| Our scan-style A4 test page, JPG: pixels per inch of paper | about 136 pixels per inch (1122 pixels across 8.27 inches) |
Sources: UPSC, "CAPF (AC) Examination 2026 notice, p.15" (https://www.upsc.gov.in/sites/default/files/ExamNotifi_CAPF_AC_Exam_2026_Eng_20022026.pdf); U.S. Department of State, "Digital image requirements (visa photos)" (https://travel.state.gov/content/travel/en/us-visas/visa-information-resources/photos/digital-image-requirements.html). Checked 2026-10-19. Portal rules change between recruitment cycles and releases; the notice or help page for your own upload has the final say.
How to get an image under 150 KB
Add the original
Use the largest, cleanest copy you have. Compressing a file that was already squeezed by a chat app loses detail twice.
Keep the strategy on Auto
Auto lowers the quality first and reduces the pixel size only when quality alone cannot reach 150 KB. "Quality first" never reduces the dimensions and stops with a message instead; "Size first" shrinks the image sooner and keeps more quality per pixel.
Choose JPG or WebP
JPG is accepted by every form. WebP can keep more pixels in the same budget, but only use it when the site lists WebP as allowed.
Check the result
The results panel shows the final pixel size and KB. Zoom in on faces and small text before uploading.
What this page produced from our test files
We ran three fixed test files through this page in headless Chrome 129.0.6668.29 on 2026-10-19, with the default Auto strategy. Sizes are the bytes of the downloaded files. The test files are generated from a fixed seed so anyone can repeat the run; they are not customer photos.
| Test file | Format | Output pixels | File size |
|---|---|---|---|
| Photo-style test image, 4032 × 3024 JPG (2.57 MB) | JPG | 4032 × 3024 | 139.1 KB |
| Photo-style test image, 4032 × 3024 JPG (2.57 MB) | WEBP | 4032 × 3024 | 145 KB |
| Screenshot-style test image, 1920 × 1080 PNG (24.3 KB) | JPG | 1920 × 1080 | 64.1 KB |
| Screenshot-style test image, 1920 × 1080 PNG (24.3 KB) | WEBP | 1920 × 1080 | 7.7 KB |
| Scan-style A4 test page, 2480 × 3508 JPG (3.4 MB) | JPG | 1122 × 1586 | 142.7 KB |
| Scan-style A4 test page, 2480 × 3508 JPG (3.4 MB) | WEBP | 920 × 1301 | 146.2 KB |
Before you upload a 150 KB file
- A 1000 × 1000 photo at 150 KB keeps plenty of bytes per pixel; spread over a 12 MP image the same 150 KB leaves about 0.09 bits per pixel. Resize to the pixel size the form wants before compressing.
- Our scan-style A4 test page had to drop to 1122 pixels across, about 136 pixels per inch of paper. Small print in a scanned document becomes hard to read at that density; compress a crop of the important part, or use a larger target if the portal allows it.
- The 1920 × 1080 screenshot-style test image fitted at full size as JPG, because flat colours and sharp edges compress far better than photos.
Frequently asked questions
Does 150 KB mean 1,000 or 1,024 bytes per KB?
Sites use both. This page stays at or below 150,000 bytes, which is under both readings, so the file passes either way.
How large can a photo be at 150 KB?
In our test a 12 MP photo-style image came out at 4032 × 3024 pixels as JPG and 4032 × 3024 as WebP. Busy, noisy photos need more bytes per pixel than plain ones, so your result can be larger or smaller.
Next steps for your 150 KB file
Related image tools
Check the destination requirement
Upload rules change between services. MAXScanner prepares the file you request, but the receiving form or service is authoritative for its current pixel, format and byte limits.