About the Compress to Specific KB/MB
Compress to Specific KB/MB is a free online compress tool from Convertify. Compress any image down to an exact target file size in KB or MB using smart binary-search quality reduction. Simply upload your file, fine-tune the settings, and download your finished result in seconds — directly from your browser, with no software to install and no account to create.
How to use the Compress to Specific KB/MB
- Click the upload box and choose your file, or simply drag and drop it in.
- Adjust the available options to match what you need.
- Click Process File and let Convertify do the work in seconds.
- Download your result instantly — no email, no account, no watermark.
Why use Convertify's Compress to Specific KB/MB?
- Free forever — every tool on this site is free to use, with no hidden limits.
- Private by design — your file is processed for this request only and never stored on our servers.
- Fast — results are usually ready in a few seconds, even for larger files.
- No installation — works entirely in your browser, on desktop or mobile.
Frequently Asked Questions
How does the tool hit an exact target file size?
It runs a binary search across quality levels (testing up to 8 different settings) until it finds the highest quality that still fits under your target KB.
What happens if my target size is unrealistically small?
The tool falls back to the lowest quality setting it has and gets as close as it can — extremely small targets on a large photo may still not be fully reachable without visible quality loss.
Does this work on PNG files too?
Yes, but PNG inputs are automatically converted to JPEG during compression, since PNG’s lossless format can’t be quality-tuned the same way — only JPEG and WebP support the target-size search.
Will my image dimensions shrink to hit the target size?
No — only compression quality is adjusted; width and height stay the same.
Can I use this for ID photos or application uploads with a strict KB limit?
Yes — this is exactly the use case it’s built for, like getting a photo under a government portal’s 100KB limit.
Can I batch-apply the same target size to many images?
No — this tool processes one image per request.
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