Compress any image to 45 KB online for free. Ideal for exam form photos, signature uploads, and ID portals with a 45 KB limit. Browser-based, no watermark.
Ideal for exam application photos, scanned signatures, and ID-portal uploads that enforce a 45 KB ceiling — a slightly more forgiving limit than the common 20-35 KB exam caps.
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To compress an image to 45 KB (46,080 bytes) for free, drop it into SammaPix Compress and adjust the quality slider until the output meets the target — for most photos, quality 30-55% reaches 45 KB. Processing happens 100% in your browser using the Canvas API — no upload, no signup, no watermark. Tested on 100 real images: SammaPix matched SSIMULACRA 2 quality scores above 65 (no visible loss) at all output sizes >= 50 KB. For sizes below 25 KB, expect visible compression artifacts on photographic content — vector-style images and screenshots fare best.
Open the SammaPix Compress tool and drag your image into the drop zone. Supports JPEG, PNG, WebP, and GIF.
Adjust the quality slider until the output size is at or below 45 KB. Lower quality = smaller file.
Download your compressed image instantly. Everything runs in your browser — your photos never leave your device.
Typical results when compressing a photo to 45 KB.
| Property | Original | Compressed |
|---|---|---|
| File size | 675 KB | 45 KB |
| Quality | 100% | 70-85% |
| Size reduction | — | ~93% |
| Format | JPEG / PNG | JPEG / WebP |
At 45 KB you can hold a 250×300 px photo at quality 70-78% with a clean, sharp face — a touch more headroom than 35 KB.
For scanned signatures, convert to greyscale before compressing — a signature has no color information, and greyscale JPEG at 45 KB is razor-sharp.
Resize to the portal's required pixel dimensions first; compressing a full-resolution scan straight to 45 KB causes unnecessary blur.
Export as JPEG for maximum portal compatibility — keep WebP for general web use, not government forms.
Ready to compress?
Use Compress to reduce your images to 45 KB or below, or Convert to WebP for even smaller files at the same quality.
Resize to the dimensions your form specifies, then compress at quality 70-78% in SammaPix until the output reads just under 45 KB. Aim for 42-44 KB to leave a safety margin against the portal's limit.
If your portal allows up to 45 KB, use it — the extra 10 KB gives a noticeably sharper face at the same dimensions. Only target 35 KB or 20 KB when the form explicitly caps you there.
Convert the signature to greyscale, crop tightly around the strokes, resize to the required width (often 140×60 px for exam forms), then compress. A signature this small reaches 45 KB at near-lossless quality.
JPEG for exam and government portals, since most only accept JPG. For a signature with flat color, PNG can also work and may look crisper — check which formats your specific portal accepts.
Compress to 35 KB
The exact target for many competitive-exam and government portals — SSC, UPSC, IBPS, and state recruitment forms frequently cap the candidate photo at 35 KB. Also used for ID document uploads with tight limits.
Compress to 50 KB
Great for email signatures, thumbnails, profile avatars, and forum uploads where small file sizes load faster.
Compress to 60 KB
Perfect for profile photos, document and ID uploads with a 60 KB cap, and crisp web thumbnails where you want more detail than a 50 KB file but still fast loading.
Compress to 30 KB
Perfect for social media profile pictures, medium-resolution thumbnails for directory listings, event badge photos, and team page headshots that need to load fast.
100% private
All compression happens in your browser. Your images never leave your device — nothing is uploaded to any server.
Instant results
No waiting for server processing. Compress images in milliseconds using your device's own hardware.
Free, no limits
Compress as many images as you want. No watermarks, no sign-up, no daily caps on the free plan.