# Downscale an Image by Percentage

URL: https://www.image-color-changer.com/downscale-image
Reduce a PNG, JPG, WebP, or SVG by a percentage with high-quality resampling. Aspect ratio preserved, smaller file size, free and browser-based.

### Downscaling without turning detail to mush
Percentages beat guessing pixels: When you only know the image is "too big", a percentage is a far more natural control than a pixel field. Halve it, check the preview, halve it again if needed. You never have to calculate the matching dimension or risk distorting the picture by getting it wrong.

Smaller dimensions, smaller file: File size scales roughly with pixel count, so dropping to 50% removes about three quarters of the pixels and shrinks the file dramatically. That is usually the fastest fix for a page that loads slowly or an attachment that will not send.

Downscaling usually looks better, not worse: Unlike enlarging, shrinking discards information rather than inventing it, and averaging several source pixels into one tends to hide noise and compression artefacts. A downscaled image frequently looks cleaner and sharper than the original did at full size.

Serving images at the size they display: A 4000 px photo shown in a 800 px column still costs the visitor the full download. Shrinking to roughly the displayed size is one of the highest-impact things you can do for page speed, and it is also what Lighthouse means by "properly size images".

Local and private: The resize happens in your browser on canvas. There is no upload step, so no queue, no size ceiling from a server limit, and no copy of your file left anywhere once you close the tab.

### How to downscale an image by percentage
1. Upload the image — Drop in a PNG, JPG, WebP, or SVG. Everything is processed locally in your browser.
2. Choose how much smaller — Drag the scale slider from 95% down to 5%. The preview shows the true relative size as you go.
3. Download — Save the smaller image at its new dimensions as a PNG.

### When smaller is the requirement
- Faster pages: Stop shipping 4000 px photos into an 800 px layout.
- Email attachments: Get under a mailbox size limit without deleting anything.
- Upload limits: Forms, forums, and job portals that cap image dimensions or weight.
- Avatars and thumbnails: Produce a small, tidy version for a profile or list view.
- Documents and decks: Keep a PDF or presentation from ballooning because of full-size photos.

### Frequently asked questions
Q: Does shrinking reduce quality?
A: Not in the way enlarging does. Downscaling averages several source pixels into each output pixel, which usually suppresses noise and JPEG artefacts. The result normally looks clean — you simply cannot go back to the larger size afterwards, so keep the original.

Q: How much smaller will the file be?
A: Roughly proportional to pixel count. At 50% you keep a quarter of the pixels, so expect something near a quarter of the file size. At 25% it is about a sixteenth. Actual numbers vary with image content and format.

Q: Is the aspect ratio kept?
A: Yes. Both dimensions scale by the same percentage, so proportions are exact and nothing is cropped or squashed.

Q: What percentage should I use for the web?
A: Aim for roughly the size the image actually displays at, then double it if you want it to stay sharp on high-density screens. For a photo in an 800 px column, a 1600 px wide export is a sensible target.

Q: Can I get the original size back?
A: Not from the downscaled file — the discarded pixels are gone. Enlarging it again would only interpolate. Always keep your original somewhere before shrinking.

Q: What format is the download?
A: A PNG at the new dimensions. That preserves transparency and avoids stacking fresh compression artefacts on top of the resize.

All tools: https://www.image-color-changer.com/llms.txt