The file is read in browser memory and a new output is created without overwriting the original.
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Converters
Image Resizer
Resizes one image up to 8192 pixels with browser Canvas, fit-within behavior, and JPG/WebP quality control. Files are not uploaded and output is created on-device. Professional print color profiles and all metadata are not preserved.
✓ Free✓ No account✓ In-browser
QUICK ANSWER
What does this tool do?
Resize and re-encode PNG, JPG, or WebP while preserving aspect ratio.
● Local workspaceInput stays in this tab
Preview · created on-device
Preview will appear here.
APPLICATION AND DECISION GUIDE
Image Resizer: method and usage
Resizes one image up to 8192 pixels with browser Canvas, fit-within behavior, and JPG/WebP quality control. Files are not uploaded and output is created on-device. Professional print color profiles and all metadata are not preserved.
local file or files of a supported type within the disclosed size limit Confirm the shape first with a small example containing no personal data.
a downloadable new file, size and format metrics, and disclosed processing limits
Practical steps
- Choose a PNG, JPG, or WebP up to 25 MB.
- Set the target box, aspect ratio, format, and quality.
- Review preview and file size, then download the new image.
preserving the original and checking that output opens correctly, retains expected pages or frames, size, and visible quality
Keep the source copy and verify output interoperability in the target application.
Suitable use cases
- Preparing web images
- Reducing email attachments
- Creating social-media dimensions
LEARN THE WORKFLOW
Guides for this tool
Data and File Integrity: JSON Schema, Image Resizing, and SHA-256
Build reviewable schemas from samples, resize images locally, and compare files with SHA-256.
Read guide →Create PDF from Images: Size, Order, and Readability Guide
Turn scans, receipts, and presentation images into one PDF with the right size and order.
Read guide →ABOUT THIS TOOL
Frequently asked questions
What input does Image Resizer accept?+
local file or files of a supported type within the disclosed size limit Choose a PNG, JPG, or WebP up to 25 MB.
What does Image Resizer return?+
a downloadable new file, size and format metrics, and disclosed processing limits The file is read in browser memory and a new output is created without overwriting the original.
How should I validate Image Resizer output?+
preserving the original and checking that output opens correctly, retains expected pages or frames, size, and visible quality
Does Image Resizer send or store input on a server?+
Tool input is processed in the active tab. Saving to the Workstation or transferring to another tool is a separate choice. Consider browser extensions and shared devices separately; the privacy page explains advertising and network connections.