01
Convert the target to bytes
The KB value is converted to bytes (KB × 1,024), and every candidate result is compared with that limit.
PNG Compression
Compress PNG files for forms, apps, and transparent graphics
A good fit for screenshots, interface exports, and graphics that need to stay clear while meeting a file-size limit.
Free
No signup
Private
Use the compressor at no cost.
Open the tool and start compressing immediately.
Compression stays in your browser and files are not stored on our servers.
Common use cases
Compressing screenshots for support tickets
Reducing signature images with cleaner edges
Reducing exported UI assets for dashboards
Preparing transparent graphics for upload limits
Sending logos, stamps, and form graphics by email
Start compressing
Set your target size, let the tool do the work, and download the result when it is ready.
What this tool does
This tool compresses PNG files toward a target KB or MB size directly in your browser. Choose the limit from your form, run compression, then review the result before your final upload.
Practical tips
- Use PNG for screenshots, logos, interface graphics, and images that need transparency.
- If the image is a photo, JPG often reaches small targets with less visible loss.
- If the form also has width or height rules, adjust dimensions before trying again.
Verifiable method
How ExactSizer targets a file-size limit
The target is treated as a maximum limit, not a promise that every source file can finish at exactly the same byte count.
02
Search for the highest usable image quality
For JPG, PNG, and WebP, the engine tests quality between 0.1 and 1.0 using 12 binary-search steps. If that is not enough, dimensions decrease in 5% increments down to a minimum of 10% of the starting dimensions. To bridge encoder size plateaus, it also tests higher-quality candidates and refines dimensions in 6 passes, always retaining the closest result under the limit.
03
Process locally and report the result honestly
The file is processed in browser memory. The result reports whether the target was met and shows a warning if minimum settings are reached before the requested size.
Popular target sizes
Many people land on pages like this because they need a specific number, not just a smaller file. These are some of the most common targets in this niche.
Common search
PNG to 50KB
Use this page when you need to compress PNG to around 50KB for upload rules, forms, or sharing limits.
Common search
PNG to 100KB
Use this page when you need to compress PNG to around 100KB for upload rules, forms, or sharing limits.
Common search
PNG to 200KB
Use this page when you need to compress PNG to around 200KB for upload rules, forms, or sharing limits.
Common search
PNG to 500KB
Use this page when you need to compress PNG to around 500KB for upload rules, forms, or sharing limits.
Common search
PNG to 1024KB
Use this page when you need to compress PNG to around 1024KB for upload rules, forms, or sharing limits.
Frequently asked questions
These answers cover the questions people usually have before compressing a file.
Can I compress PNG to 100KB?
Yes. PNG files can be reduced to targets like 100KB or 200KB, although graphic complexity affects how close the result can get.
Will transparency be preserved?
That depends on the output path needed to reach the target. Simpler files preserve transparency more easily than very large or detailed ones.
Is PNG better than JPG for screenshots?
Often yes, especially for text-heavy screenshots and interface graphics. For photo-heavy content, JPG may compress more efficiently.
Related resources
Useful next pages for common targets, format changes, and upload problems.
Also useful
Signature to 20KB
For scanned signatures, online forms, and exam portals.
Also useful
Signature to 50KB
For scanned signatures and forms with less aggressive limits.
Also useful
Image to 50KB
For strict portals, small photos, and form images.
Also useful
Compress JPG or HEIC to an Exact KB Size
Reduce JPG, JPEG, and iPhone HEIC files to the size you need for forms, portals, and everyday uploads.
Also useful
Compress WebP to an Exact KB Size
Compress WebP images to a specific KB target for lighter pages and cleaner media uploads.
Also useful
Compress an Image to 100KB for Passport, Visa, and Job Forms
A practical guide for people who need a photo under 100KB for government portals, embassy forms, and hiring systems.