Home › All tools › Image Compressor – Reduce Photo Size to 20 KB, 50 KB, 100 KB
Compress Image to 100 KB – JPG and PNG
- Files stay on your device
- No sign-up
- No watermark
- No daily limit
- Full resolution
100 KB limits usually apply to bigger uploads: handwritten declarations, certificate photos and full-page document images. The tool is pre-set to 100 KB.
Quick answer
- 1 Upload
- 2 Adjust & process
- 3 Download
How to use
Where a 100 KB limit is used
- Handwritten declaration: IBPS-style forms ask for an 800 × 400 px declaration of 50–100 KB. Set max width 800 and compress.
- NEET-style signature slots that allow 10–100 KB – 100 KB keeps the ink crisp.
- Certificates or mark-sheet photos clicked on a phone (often 3–5 MB) that a portal caps at 100 KB.
Sizes above are examples from our guides; always confirm the limit in your official notice .
How to compress to 100 KB
- Choose one or more photos.
- The size is already set to 100 KB – change it if your form differs.
- Optionally set a max width (pixels) if the form fixes dimensions.
- Press Compress, then download each file or a ZIP.
For text documents, keep the max width around 1000–1200 px so writing stays readable. For PDFs use the PDF Compressor instead.
Want the background? Read how to reduce photo size to 20–50 KB or use the full Image Compressor. Other targets: 20 KB · 50 KB · 200 KB.
🔒 Privacy: this tool runs entirely in your browser. Your files are never uploaded.
Size rules
Exam-wise photo and signature size (KB)
| Exam | Photo | Signature | Other uploads |
|---|---|---|---|
| SSC CGL / CHSL 2026 | No file – photo is captured live in the form | JPG, 10–20 KB, about 6.0 × 2.0 cm | – |
| IBPS PO / Clerk | JPG, 20–50 KB, 200 × 230 px | JPG, 10–20 KB, 140 × 60 px | Left thumb 20–50 KB · handwritten declaration 50–100 KB |
| SBI PO 2026 | JPG, 20–50 KB, 200 × 230 px | JPG, 10–20 KB, 140 × 60 px | Left thumb 20–50 KB (240 × 240 px) · declaration 50–100 KB (800 × 400 px) |
| NEET UG 2026 | JPG, 10–200 KB, face ~80%, white background | JPG, 10–100 KB | Finger & thumb impressions: the bulletin gives both 10–200 KB and 50–300 KB, so 50–200 KB fits both |
| UPSC (CAF) | JPG, 20–200 KB, face ≥75% (plus a live photo) | Three signatures in one JPG, 20–100 KB, 350–500 px | – |
| Rajasthan RSSB / RPSC (SSO OTR) | Live photo captured in OTR | JPEG, 20–50 KB, 280 × 80 to 560 × 160 px (Hindi and English) | – |
Checked against official notices (SSC CGL 2026, IBPS PO/Clerk 2026, SBI PO 2026, NTA NEET UG 2026 bulletin, UPSC CAF instructions, Rajasthan recruitment portal) on 4 Nov 2026. Rules change every year – always confirm in the current notification before you submit.
Size rules
100 KB photo: what to check before uploading
KB measures file size; pixels measure width and height. A 100 KB file has no single pixel size. Meet both limits from your form, not just one.
For a strict 100,000-byte maximum, try 97 KB in this tool (97 × 1,024 = 99,328 bytes), then check the downloaded file. The usual 100 KB setting uses 102,400 bytes. Leave a similar margin at 20 KB or 50 KB when your portal counts decimal bytes.
- Choose the original JPG or PNG. JPG is selected for output; PNG transparency becomes a solid background.
- Keep 100 KB for a normal binary KB limit, or use 97 KB for a strict 100,000-byte cap.
- If the form requires exact width and height, use the pixel resizer first; Max width alone does not set both dimensions.
- Press Compress, download and inspect the result at full size. Check actual bytes in file properties, not Size on disk.
A detailed page or small handwriting may not remain clear at 100 KB. Crop unused margins without cutting content, or use a higher limit only if the portal allows it. For document files use PDF to 100 KB. For smaller photos read how to reduce photo size to 20–50 KB.
FAQ
Frequently asked questions
Can I compress a 2 MB JPG to 100 KB?
Often yes, but not losslessly. The tool lowers JPG quality and may reduce dimensions. The result depends on image detail; check that faces, signatures and text remain clear.
Does compressing a PNG to 100 KB keep PNG format?
No. This tool offers JPG or WebP output. JPG replaces transparent areas with a solid background. Choose the output format accepted by your upload form.
How do I keep a 100 KB image under 100,000 bytes?
Use a 97 KB target, which is 99,328 bytes in this tool, then inspect the downloaded file size. A 100 KB target can mean 102,400 bytes, which exceeds a decimal 100,000-byte cap.
Will text in my document stay readable at 100 KB?
It depends on the original and the amount of small print. Open the result at full size; crop unused margins or use a higher permitted target if text is blurred.
Can I convert PNG scans?
Yes – they are converted to JPG, which is much smaller. Transparent areas become white.
Why is my result 96 KB and not exactly 100 KB?
JPG size moves in small steps; the tool stays just under your limit so the portal accepts it.
Is my document uploaded anywhere?
No. Everything runs inside your browser.
How do I resize an image to 100 KB on mobile?
Open this page in Chrome or Safari, choose the photo, keep the 100 KB target and tap Compress. Download the JPG – no app is needed.
Is 100 KB good enough for a document photo?
Not for every page. Small print, seals and handwriting may blur; inspect the downloaded result before submitting. For a PDF document use compress PDF to 100 KB.
How do I reduce a photo to 100 KB without losing quality?
Resize it to about 1000–1200 px on the long side first, then compress to 100 KB. Fewer pixels let the JPG keep higher quality at the same KB.
Is 100 KB the same as 0.1 MB?
Roughly. 100 KB is about 0.1 MB (exactly 0.098 MB if the portal counts 1 MB as 1024 KB).
What is the photo size for IBPS and SBI PO?
JPG of 20–50 KB at about 200 × 230 px. The signature is 10–20 KB at 140 × 60 px.
What is the NEET 2026 photo size in KB?
The NEET UG 2026 bulletin asks for a JPG passport photo of 10–200 KB with about 80% face and a white background, and a signature of 10–100 KB.
Related tools
Need a different limit? Use the image compressor for 20, 50 or 200 KB, or compress a PDF to 100 KB.