File too large to upload?
A form just rejected your photo or PDF? Make it fit — exactly — in seconds. Compress to 20 KB, 100 KB, 1 MB or any size you need. Your files are processed entirely on your own device — they are never uploaded to us or anyone else. We couldn’t see them if we wanted to.
Pick your exact target
Compress image to 20KB
Government portals, ID photos, strict forms.
50 KBCompress image to 50KB
Job applications and admission forms.
100 KBCompress image to 100KB
The most common upload limit on the web.
200 KBCompress image to 200KB
Profile photos and document scans.
500 KBCompress image to 500KB
Email attachments and listings.
1 MBCompress image to 1MB
Forum and CMS upload ceilings.
PDF KBJPG to PDF under 100KB
Documents that must stay tiny.
↑KB KBIncrease image size
For portals with a minimum file size.
How it works
Drop your file
Drag an image (JPG, PNG, WebP) or PDF into the tool — or browse, or paste. It opens directly in your browser.
We hit your target
The engine finds the highest quality that fits your exact KB or MB limit, resizing dimensions only when needed.
Download & upload
Save the result and pass that upload check. Before/after preview included, so you can see the quality yourself.
Private by architecture, not by promise
Your files are processed entirely on your own device — they are never uploaded to us or anyone else. We couldn’t see them if we wanted to. This website is served from servers in the United States (North Carolina).
Processed on your device
The compression engine is JavaScript running in your browser. There is no upload step in the code — nothing to trust, just how it works.
No signup, no watermark
Every tool is free and works instantly. No account, no email required, no marks on your files.
Honest results
If your target size can’t be reached at acceptable quality, we say so and tell you exactly what to change — not silently degrade your file.
Frequently asked questions
Are my images uploaded to your server?
No. Every tool on this page runs as JavaScript inside your browser. Your file is opened locally, processed locally, and downloaded locally — it never travels to us or anyone else. We couldn’t see it if we wanted to.
Is KBWise really free?
Yes — free, no signup, no watermark, no daily limit. We plan to offer an optional paid tier later for bulk processing, but single-file tools stay free.
Why does my image need to be a specific KB size?
Many upload forms — government portals, job applications, school admissions, profile systems — enforce strict file-size limits and reject anything larger (or sometimes smaller). These tools hit those exact targets.
Will compressing ruin my photo quality?
Usually no. The engine finds the highest quality that fits your target. If a target is so small that quality must drop sharply, we show you the result honestly and suggest what to change instead of silently degrading it.
What formats are supported?
JPG, PNG, and WebP for images — plus PDF tools for converting images to PDF and compressing PDFs. PNG output can’t hit exact KB sizes (the format doesn’t allow it), so KB-target tools output JPG or WebP.