Comparisons5 min read
TinyPNG Alternative: When Browser-Only Wins
A TinyPNG alternative that never uploads your files: what pixeltools' compressor does, where TinyPNG still wins, and the real limits of each.
Compress image to 100KB
Reduce a JPG, PNG or WebP to 100 KB or less while keeping it sharp. Free, instant, and private.
Drop images here, click to browse, or paste
Supports JPG, PNG, WebP, HEIC, and GIF — up to 50 MB each
Why use PixelTools to compress image to 100KB
Sharp at 100 KB
100 KB leaves room for real detail. Most photos only need a small quality reduction, so the pixel dimensions usually stay untouched.
Fits the 102,400-byte limit
The result is guaranteed at or under 100 x 1024 bytes, the way upload forms measure it.
Batch friendly
Drop several images at once and they are all fitted to 100 KB. Download them one by one or as a ZIP.
Stays on your device
Nothing is sent to a server. That matters when the image is an ID, a certificate or a receipt.
Three steps to a 100 KB image
- 1
Drop one or more images
JPG, PNG, WebP and HEIC all work. The 100 KB limit is already set.
- 2
Watch it fit
Each image is re-encoded to the best quality that stays under 100 KB.
- 3
Download
Save a single file or a ZIP of all of them.
When you need an image under 100 KB
Upload forms check file size before anything else. Here is where this limit usually comes up.
Certificates and ID proofs
Many portals take a scanned certificate or ID at up to 100 KB. A 1 to 3 MB phone scan usually drops under the limit with text still legible.
Product and listing photos
Marketplaces and internal catalogs sometimes cap listing images around 100 KB. This keeps product shots crisp enough to sell.
Blog and CMS uploads
A 100 KB image is a reasonable ceiling for inline pictures that should not slow a page down.
Frequently asked questions
How do I compress an image to under 100KB?
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Drop it here. The tool finds the best quality that fits under 100 KB and shows the final size next to the original.
Does it change the image dimensions?
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Only if it has to. It reduces quality first, down to a still-good level, and only then shrinks the pixel size. Many photos fit under 100 KB without any resize.
Why is the result smaller than 100KB, not exactly 100KB?
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It stops at the highest quality that fits. The file lands just under the limit, but JPEG sizes move in steps, so it can end a few KB below. A lower number is still valid for any 'under 100 KB' rule.
Can I compress a screenshot to 100KB?
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Yes. Screenshots with flat colors and text often compress well. If a PNG screenshot is large, converting to JPEG or WebP is what makes the big difference.
How does the compressor reach the size?
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The compressor re-encodes your image as JPEG or WebP and searches for the highest quality that still fits under 100 KB. If quality alone would have to drop too far to get there, it also shrinks the pixel dimensions a little. All of it runs in your browser, so nothing is uploaded.
From the blog
Guides8 min read
The Complete Guide to Image Compression
How JPEG, PNG, WebP, AVIF, and GIF compression actually work, plus a practical guide to picking quality settings without visible loss.
Guides5 min read
Why Converting PNG to JPG Makes It Bigger
Why converting PNG to JPG sometimes increases file size instead of shrinking it, and how to pick the right format or tool for the image you actually have.
Image Formats5 min read
AVIF vs WebP vs JPG: Best Format for 2026?
AVIF, WebP, and JPG all compress differently and suit different use cases. Here's a direct comparison to help you pick the right format for your images.
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