Aspect ratio math
Aspect Ratio = Width ÷ Height. Keeping aspect ratio locked automatically recalculates corresponding height when width is modified, preventing distortion.
Social media dimension guide
YouTube Thumbnail (1280×720, 16:9), Instagram Post (1080×1080, 1:1), TikTok/Shorts (1080×1920, 9:16), Twitter Header (1500×500, 3:1).
Getting a trustworthy result
Image Resizer & Aspect Ratio Cropper runs entirely in your browser from the numbers you enter. Check the methodology notes above, then compare with a related calculator or a short guide if you want a second pass before you decide.
What to do next
If prices or rates sparked this visit, glance at Markets. If you want a walkthrough, open a related guide. Or switch to another calculator in the same category to finish the task in one sitting.
FAQ
Will resizing distort my photo?
Not if 'Lock Aspect Ratio' is enabled — the calculator scales width and height proportionally.
Can I enlarge a small photo without losing quality?
Subtle enlargement works well with bicubic smoothing, but extreme upscaling beyond 200% may cause pixelation.
Is the Image Resizer & Aspect Ratio Cropper free?
Yes. It runs in your browser with no account required.
Where should I go after using this tool?
Try related tools in the sidebar, Markets for live-style price snapshots, or Blog guides that link back into calculators.