Compress Image Online
Shrink any image to an exact KB target — without it ever leaving your device.
100% in your browser — files never uploaded
How to compress an image to 100KB or any exact target size
Drop your image, switch to Target Size mode, and type the KB limit you need — 20KB, 50KB, 100KB, 200KB, anything. The tool runs a binary search across quality levels, re-encoding until the file lands at or just under your target. You get the highest visual quality that still fits the limit, instead of guessing with a slider. It works for government portal uploads, email attachments and web publishing alike.
Your images never leave your device
Most online compressors upload your files to a server, process them remotely, and keep a copy you can neither see nor delete. This tool runs entirely on the Canvas API inside your own browser, so image data never crosses the network. That makes it safe for ID documents, KYC photos and medical records — and faster too, because there is no upload or download wait.
JPG vs PNG vs WebP — which format compresses smallest?
For photographs, WebP is typically 25–35% smaller than JPG at the same visual quality, and JPG in turn beats PNG by a wide margin. PNG only wins for screenshots, logos and graphics with sharp edges or transparency. If your upload portal accepts modern formats, convert photos to WebP before compressing; if it demands JPG, Target Size mode still squeezes the most quality into your KB budget.
Compress an Image to 20KB, 50KB or 100KB for Exam and Portal Uploads
Indian exam portals enforce strict KB windows: SSC signatures at 10–20 KB, IBPS thumb impressions at 20–50 KB, UPSC photos up to 300 KB, and countless job and college portals with their own limits. Guessing with a quality slider wastes attempts — this tool's Target Size mode runs a binary search across JPEG quality levels, re-encoding until the file lands at or just under the exact KB value you type. You get the maximum visual quality the limit permits, first try. Everything runs in your browser via the Canvas API, so photos, ID documents and signatures never touch a server. If your portal enforces a MINIMUM file size instead, use our Increase Image Size KB tool — portals reject undersized files just as strictly.
Quality Slider vs Target Size — Which Mode to Use
Use the quality slider when you just want a smaller file for email, WhatsApp or a website and the exact size doesn't matter — quality 70–85 shrinks most photos 60–80% with no visible difference at normal viewing sizes. Use Target Size mode when a form or portal names a hard KB limit, because it removes trial and error entirely. One caveat worth knowing: JPEG compression is lossy and cumulative, so always compress from your original photo rather than from an already-compressed copy. Each re-save discards a little more detail (generation loss), and a signature or fine text compressed twice can turn illegible even at settings that look fine on a fresh original.
When Compression Isn't Enough: Convert the Format
If a photo refuses to shrink below your target without visible artifacts, the format itself is usually the bottleneck. WebP encodes the same photograph 25–35% smaller than JPG at matching quality — convert with our JPG to WebP tool when the destination accepts modern formats. Going the other way, photographic PNGs are the most common oversized offenders: PNG is lossless and cannot discard detail, so a photo saved as PNG can be 5–10× heavier than it needs to be. Convert it to JPG first, then compress. Screenshots, logos and graphics with sharp edges are the exception — those stay cleaner as PNG, where our PNG compressor shrinks them by reducing dimensions instead.
Frequently asked questions
Is this image compressor really free?
Yes. Compressing up to 3 images at a time is free forever, with no watermarks, sign-ups or daily limits. Pro exists only for power features like large batches and ZIP export.
Are my images uploaded to a server?
No. All compression happens locally in your browser using the Canvas API. You can verify this: load the page, go offline, and the tool keeps working.
How do I compress an image to exactly 100KB?
Choose Target Size mode, enter 100 in the KB field, and download. The tool automatically finds the highest quality that fits under 100KB.
Will compression make my image blurry?
At moderate settings the difference is invisible at normal viewing sizes. Very small targets trade visible detail for file size — the live preview shows exactly what you get before downloading.
Photo ka size 20KB kaise kare?
Upload your photo, switch to Target Size mode, enter 20 and download — the tool binary-searches JPEG quality until the file lands at or just under 20KB.
Photo chota karne ke liye quality kitni rakhein?
Quality 70–85 shrinks most photos 60–80% with no visible difference at normal viewing sizes. Use Target Size mode instead when a portal names a hard KB limit.
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Data verified: 2026-07-03 · All processing happens in your browser — no files are ever uploaded.