Resize Image
Resize image by width / height or by percentage.
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How to resize an image
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Upload your image.JPG, PNG, WebP, BMP, GIF — drag or click. Up to 100 MB.
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Set new dimensions.Type width × height in pixels, or pick a preset (1080p, 4K, Instagram square 1080×1080, Twitter banner). Aspect ratio lock prevents distortion.
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Download resized image.New image downloads at the dimensions you set. Original on your computer is unchanged.
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What is Image Resizing?
Image resizing changes the dimensions of an image — making a 4000×3000 phone photo into a 1080×810 web-friendly version, or shrinking a screenshot for an email signature. Different from compression: resize changes the actual pixel count. Useful when you have a giant photo but need a small version for a website, profile picture, or document.
Drop an image, type the new width and height (or pick a preset like 1080p, Full HD, Instagram square), and we resample it using high-quality Lanczos interpolation — preserving sharpness as much as possible. Lock the aspect ratio to avoid stretching, or unlock it to force exact dimensions.
Is Resize Image free?
Resize Image is completely free: no sign-up, no registration, no watermark, no ads. It works online — just open it in your browser on a phone, tablet or computer; you never install anything.
Your files are deleted from the server once the job is done; they are not shared with anyone and their content is not inspected. There is no daily limit, no trial period and no hidden fee.
Also searched as: resize image, change photo size, reduce pixels, image resizer online
Why resize with PDF7?
Lanczos quality
Top-tier resampling algorithm. Edges stay crisp, text stays readable, no muddy artifacts.
Common presets
1080p, 4K, Instagram, Twitter, Facebook profile, A4 print sizes — pick one click.
Aspect lock
Lock the ratio to prevent distortion. Unlock for exact dimensions even if it stretches.
Free, instant
No signup. Drop image, set size, download. Done in 2 seconds.
Frequently asked questions
Will resizing make the image blurry?
Slightly downsizing (e.g., 4000→1080 px) actually keeps it sharp. Upscaling (1080→4000) is what blurs because we are inventing pixels. We use Lanczos which is the best for downscale; AI upscaling is on roadmap.
Can I keep aspect ratio?
Yes. Click the lock icon — type one dimension and the other auto-fills proportionally.
What about transparent PNGs?
Transparency is preserved. PNG stays PNG, transparent areas stay transparent.
Are my files stored?
No. Processed in memory, deleted after download.