Compress Image to Under 100KB — Exact Target
Hit an exact file-size target in kilobytes with our in-browser precision compressor.
Drop your image to convert
or click to browse — paste (Ctrl+V) works too
How Our Privacy Engine Works
When you drop an image onto VisualConvert, our code runs entirely inside your device's web browser using modern web standards (Canvas API & WebAssembly). Unlike traditional converters that upload your photos to remote servers, process them there, and send them back, VisualConvert processes everything locally in your computer's memory. You can verify this anytime: open your browser's Developer Tools (F12), switch to the Network tab, and drop a file — you will see zero upload requests!
How to Convert Images
Three simple steps to process your files securely.
Drop Files
Drag and drop your images or click to browse. We support HEIC, WebP, PNG, JPG, and more.
Choose Format
Select your target format, quality, or exact file size target in kilobytes.
Download Instantly
Download single files or grab a ZIP archive of all your converted images immediately.
Related Conversions
Quick links to our most used tools.
Frequently Asked Questions
Are my files uploaded to a server?
No. VisualConvert processes everything locally within your web browser using HTML5 Canvas and WebAssembly. Your files never leave your device.
Is there a limit to how many files I can convert?
Free users can process a limited batch size at once. Pro users unlock massive batches and advanced sizing algorithms.
Does this work on mobile devices?
Yes, our client-side engine works on any modern browser including Chrome, Safari, and Firefox on iOS and Android.
How do you achieve exact file sizes (e.g., under 100KB)?
We use a smart binary search algorithm that repeatedly compresses the image locally until it precisely hits your requested target size without sacrificing unnecessary quality.
About Compress Image to Under 100KB
A lot of upload forms do not ask for an exact size; they set a ceiling. Under 100KB. No larger than 100KB. Maximum 100 kilobytes. This tool is built for that phrasing: you name the limit and it lands the file safely beneath it, rather than making you guess at a quality slider until the number happens to fit.
It works by binary search. Instead of exporting the image over and over at random settings, it homes in on the largest file that still fits under your ceiling, so you keep as much quality as the limit allows. Aim for under 100KB, or type any other cap a form throws at you, and it does the arithmetic. Everything runs in your browser, so the photo is never uploaded.
Why use VisualConvert
- Built for "under X KB" ceilings, not just round presets
- Binary-search compression keeps the most quality the cap allows
- Type any limit — 100KB, 80KB, 40KB — not a fixed number
- Runs in your browser; nothing is uploaded
Frequently Asked Questions
What does "under 100KB" actually mean for a form?
It means the file must be 100KB or smaller. A file of exactly 100KB is usually accepted, but to be safe this tool aims for just under the limit so there is no rounding surprise at upload time.
How do I get an image under 100KB without it looking bad?
Let the tool target the ceiling for you. It keeps the largest, best-quality file that still fits, and only reduces the dimensions when the image is too large to fit at any quality. Reducing width and height is the usual fix for a stubborn photo.
Can I target a limit other than 100KB?
Yes. Type whatever ceiling the form requires and the compressor aims for it, whether that is 100KB, 60KB or something else.
Does the image get uploaded?
No. The file is compressed on your own device in the browser, so it is never transmitted anywhere.
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