Image compressor
Compress images to 100 KB
100 KB is preselected — switch targets freely. Compression happens entirely on your device: no uploads, measured results from the real output file, and a straight answer when a target is out of reach rather than a fabricated “success”.
Target size
Resize pixels (optional)
Aspect ratio is always preserved. Leave blank to keep the original pixels.
Drop images here
JPG · PNG · WebP — up to 24 files per batch
What 100 KB buys you
100 KB is the sweet spot between “small enough to satisfy a form” and “good enough for a human to judge an image”. The engine runs a measured search — trying quality levels and, when required, resolution steps — and reports which attempt won. A result card that says Target met means the real output file, in bytes, is at or under 100 KB. Best effort means you got the smallest viable size and the note explains why the cap could not be hit honestly.
The format decides the fine print: to reduce the size of a JPG to 100 KB, quality alone usually suffices with dimensions untouched; a heavy PNG gets an explicit choice between an alpha-preserving WebP and a labelled flatten. And if the form also names exact pixel dimensions, the dimension limiter resizes to meet them while preserving aspect ratio. Batch as many files as you like — each gets its own card, and a ZIP bundles every result in one download with collision-safe names.
100 KB questions, answered honestly
Why do so many forms pick 100 KB?
100 KB is a good compromise for portals that store thousands of uploads: photos remain readable at typical screen sizes while the storage footprint stays small. Signature documents, ID scans and profile images are all commonly capped near this size.
How much quality survives at 100 KB?
A photo of a few megapixels lands at 100 KB with quality that looks untouched on screens at normal viewing sizes — it is re-encoded and, if needed, lightly downscaled. Large prints are a different story; keep the original for print and give the form the 100 KB copy.
Can I compress to 100 KB without resizing dimensions?
The tool starts with quality-only compression and reaches for a resolution step only when quality alone cannot hit the target. There is also an explicit dimension limiter you can set if a portal demands specific pixel sizes — aspect ratio is preserved.
What about PNG logos or screenshots?
Flat graphics often compress poorly as JPEG. For PNGs the tool can offer a WebP version on one click where the browser supports alpha, or a clearly labelled JPEG flatten for opaque images. The result card always names the format you ended up with.
What kinds of images reach 100 KB easily?
Most photos and screenshots do. A few megapixels of ordinary detail lands at 100 KB with quality that looks untouched on screen. Dense graphics and high-noise scans are harder, and may need a smaller pixel size to stay readable.
How do I reduce an image to 100 KB in the fastest way?
Keep the target preset, drop the file in and download. If a portal asks for several documents at once, batch up to 24 files and take the whole set as one ZIP.
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