Compress image file size to a target KB
Use this image compressor by size to choose a custom KB target, reduce image size in KB, and review each result before downloading.
Simple local workflow
How local optimization works
Add files, review the local queue, and process each file with the matching browser-based workflow.
Enter the required file size
Type the KB value requested by your form, CMS, email tool, or upload portal before adding images.
Add JPEG, PNG, or WebP images
Select files from your device and keep image compression in the browser without creating an account.
Review size and download
Check output size, target status, quality attempts, and dimensions before saving the compressed image files.
Set any KB target
Choose a custom file-size target such as 100 KB, 200 KB, 500 KB, 1 MB, 2 MB, or the exact upload limit you need.
Reduce image size in KB
CompressWise searches for a practical smaller file while keeping the public workflow local in your browser by default.
Know whether it worked
Every result shows hit target, already under target, or closest result so you can decide whether the output is acceptable.
Built for practical asset work
Why choose this browser-based tool?
A useful image workflow should be clear about privacy, quality, supported formats, and the tradeoffs behind every result.
Built around file size, not guesswork
This page is for people who need to compress image file size to a specific KB limit, not just move a vague quality slider.
Useful for custom upload limits
Use it when a form, CMS, email tool, or portal asks for a size that does not match the fixed 50KB, 100KB, 200KB, or 500KB pages.
Quality search before resizing
The workflow tries codec quality settings first and uses resize fallback only when the target is too small for quality alone.
Honest about hard targets
Some images cannot reach a small target without visible quality loss or smaller dimensions, so closest results are labeled clearly.
Format and workflow
Choose the right optimization strategy
File type, transparency, markup, and visual detail all affect the best local processing route. Start with the page default, then review the result before publishing important assets.
Best for photos
JPEG usually responds well to quality search and is often the easiest format to compress toward a smaller file size.
Best for screenshots and transparency
PNG file size depends on colors, transparency, and flat graphics, so aggressive KB targets may need stronger tradeoffs.
Best for modern web assets
WebP files are often compact already, but a custom file-size target can still help with CMS and performance limits.
Settings that match the job
Each public tool keeps the main workflow simple while still letting the format use the right local optimization behavior.
Target
Start with a realistic KB limit
Choose the file-size limit that matches the real task. Very small targets may require quality reduction or smaller dimensions.
Status
Check hit target or closest result
A hit means the output is at or below the target. Closest result means the tool could not safely reach that file size.
Originals
Keep your source image
File-size compression can change quality, dimensions, or metadata, so keep the original image for important work.
Common use cases
Prepare lighter image assets for everyday work
A browser-based queue is useful whenever an image asset needs to travel faster, load sooner, or fit within a practical file-size limit.
Custom upload limits
Prepare images for portals or online forms that ask for a specific maximum file size in KB.
CMS image limits
Reduce image file size before uploading to blogs, documentation, product pages, or admin panels.
Email attachments
Make large images easier to attach or share by targeting a practical KB or MB size.
Performance budgets
Create lighter page assets when every image needs to fit a file-size budget.
Nonstandard KB targets
Use this page to compress image to 1MB, compress image to 2MB, or handle limits that do not fit the fixed 50KB, 100KB, 200KB, or 500KB tools.
Batch cleanup
Apply the same target size to several images and review each compressed result individually.
Privacy by design
Your files should stay yours
The free public tool is designed around a local processing path. That boundary should remain visible as the product grows.
No upload by default
Selecting a file should not send the image to our server. The public target-size tool is designed around browser-local processing.
No account required
You can compress image file size without creating an account, adding billing details, or saving a cloud history.
Result details stay visible
Each result shows the target, output size, status, and whether resize fallback was used.
Current release boundaries
Know the limits before you start
Clear limits make browser-local tools more predictable, especially on mobile devices with less available memory.
- This page accepts JPEG, PNG, and WebP images.
- Targets can be set from 10 KB to 5000 KB.
- A local batch can contain up to 10 images to keep memory usage predictable.
- Each image must be 20 MB or smaller in the current public interface.
- Image file size is not the same as width and height; this page targets KB, not dimensions.
- Exact byte-level output cannot be guaranteed for every image and format.
- Very aggressive targets may require visible quality reduction or resized dimensions.
Questions, answered
Browser-based tool FAQ
How do I reduce image size in KB?
Enter the KB limit you need, add a JPEG, PNG, or WebP image, and review whether the compressed result hit the target or only reached the closest safe result.
Can I compress image to target size?
Yes. This page is built to compress image to target size when you know the maximum KB or MB value required by a form, CMS, or portal.
Is this an image size reducer?
Yes, but it is an image size reducer for file size in KB or MB, not a width and height editor for changing pixel dimensions only.
Can I compress image to required size or custom size?
Yes. Use the target field to compress image to required size, and use the same workflow when you need to compress image custom size for a nonstandard upload rule.
Can I reduce image to specific size or resize image to KB?
Yes. In search terms, reduce image to specific size and resize image to KB usually mean lowering file size, so this page targets the selected KB value.
Is image file size the same as image dimensions?
No. File size is measured in KB or MB, while dimensions are width and height in pixels. This page focuses on reducing file size in KB.
Can this tool compress an image to an exact file size?
It compresses toward the selected target and reports whether the result is at or below that target. Exact byte-level output cannot be guaranteed for every image.
What happens if the image cannot reach my target KB?
The result is marked as closest result. You can choose a larger target, accept stronger tradeoffs, or start from a smaller source image.
Does the tool resize images?
It searches quality settings first. Resize fallback is used only when the selected target is too small for quality changes alone.
Which formats are supported?
The target-size workflow supports JPEG, PNG, and WebP images in the current public release.
Are my images uploaded?
No. The public workflow is designed to process selected images locally in your browser by default.
Should I use this page or a fixed 50KB or 100KB page?
Use this page for custom KB limits. Use the fixed 50KB, 100KB, 200KB, or 500KB pages when that exact target matches the upload rule.
Ready to try it?
Return to the local file queue
Select your files and keep the public workflow inside your browser.