Resize images
Set exact pixel dimensions or scale by percentage, one image or thirty.
Resizing changes how many pixels an image contains. Smaller means faster pages and smaller uploads; larger means filling a screen or meeting a minimum-dimension rule.
Invo uses high-quality smoothing when scaling and never uploads your files.
How to use it
- Add your images.
- Enter a width in pixels, or switch to percentage scaling.
- Keep the aspect ratio locked unless you specifically want distortion, then process.
Pixels or percentage?
Pixels when something external dictates the size — a form requiring 600 × 600, a website header, a marketplace listing spec.
Percentage when you are working with a batch of mixed sizes and want everything reduced proportionally.
Leave aspect ratio locked in almost all cases. Setting width and height independently stretches faces and warps text. If you need a specific shape, crop to it instead — that removes pixels rather than distorting them.
Enlarging images
Scaling up cannot add detail that was never captured. The browser interpolates — inventing intermediate pixels by averaging neighbours — which makes the image larger and softer, never sharper.
Modest enlargement, up to about 200%, is usually acceptable, particularly for print where viewing distance is greater. Beyond that, softness becomes obvious.
Common target sizes
- Instagram — 1080 × 1080 square, 1080 × 1350 portrait
- Facebook cover — 820 × 312
- YouTube thumbnail — 1280 × 720
- LinkedIn banner — 1584 × 396
- Website hero — 1920 px wide is plenty; 2560 px for retina
- Passport photograph — 3.5 × 4.5 cm, roughly 413 × 531 px at 300 DPI
Questions
Does resizing reduce quality?
Making an image smaller is clean — you are discarding pixels you do not need. Making it larger cannot restore detail and always softens.
How do I resize without stretching?
Keep aspect ratio locked and set only the width; height follows automatically.
Can I resize many images to the same size at once?
Yes, up to 30 at a time.
What about DPI for printing?
DPI is metadata describing physical print size; it does not change pixel count. For a 4 × 6 inch print at 300 DPI you need 1200 × 1800 pixels.
Are my images uploaded?
No. Resizing happens in your browser.
Which formats can I resize?
JPG, PNG, WebP, GIF, BMP, TIFF, AVIF, HEIC and camera RAW.