Overview
Images arrive at whatever size the camera felt like, and destinations are picky: a marketplace wants 800×800, a banner wants 1920×480, a profile photo wants a neat square. Resizing by hand in desktop software works but is slow for one-offs — and uploading personal photos to a random converter site is a privacy trade nobody should have to make.
This page resizes entirely in your browser. The true dimensions appear the moment your image loads, so you work from facts; type any width and height down to the pixel, lock the aspect ratio so nothing stretches, or jump to a one-click preset. Choose PNG for graphics or JPEG for photos, preview the result, and download — the source file is never modified.
What actually happens when you resize?
Resizing rebuilds the image at a new pixel grid. Shrinking is straightforward — the software averages neighbouring pixels down. Enlarging invents pixels by interpolation, guessing what should sit between the real ones, which is why upsized images look soft: no detail is created, only smoothed. The golden rule is to start from the largest source you have and only ever shrink.
The aspect-ratio lock exists because unlinked resizing stretches. A 4:3 photo forced into a square becomes a funhouse mirror unless it is cropped or padded instead. Lock the ratio, change one side, and let the other follow — distortion-free by construction.
Features
- Exact pixel control — type any width and height, down to the single pixel.
- True dimensions shown the moment your image loads, so you work from facts.
- Aspect-ratio lock — change one side and the other follows; nothing stretches by accident.
- One-click presets: 1920×1080, 1280×720, 800×600 and 512×512.
- PNG or JPEG output — lossless PNG for graphics, JPEG for photographs.
- Size preview — resulting dimensions and estimated file size before you download.
- Original untouched — resizing creates a new copy; the source file is never modified.
Benefits
- Pixel-perfect specs. Hit a platform's exact requirements first time.
- No distortion, ever. The ratio lock makes stretching impossible.
- Private. Personal photos never leave your device.
- Fast one-offs. Quicker than opening desktop software for a single image.
Who can use it
Sellers preparing marketplace listings, bloggers fitting theme dimensions, developers generating thumbnails and og:image assets, social media managers hitting platform specs, and students formatting figures for papers. Anyone who has ever been told ‘image must be exactly 1200×628’ — this is the two-minute fix.
How to use
- Drop an image in or click to browse; its true dimensions appear immediately.
- Type the width and height you need, or pick a preset.
- Keep the aspect-ratio lock on unless you genuinely want to stretch.
- Choose PNG for graphics and text, JPEG for photographs.
- Check the preview, then download the resized copy.
Frequently asked questions
Will resizing reduce quality?
Shrinking barely does — downsampling averages neighbouring pixels together cleanly, so smaller versions look crisp. Enlarging is the risky direction: interpolation invents pixels rather than recovering detail, so upsized images look soft. For best results always work down from the largest original you have, and avoid resizing the same file over and over.
Should I choose PNG or JPEG output?
PNG for graphics: logos, screenshots, diagrams, anything with text or flat colour — it stays razor sharp at any size. JPEG for photographs: it compresses the smooth gradients of real-world images far smaller than PNG ever could. When torn, the preview's estimated file size usually settles the argument in seconds.
What does the aspect-ratio lock actually do?
It links width and height so that changing one recalculates the other proportionally — a 4000×3000 image set to 800 wide becomes 800×600 automatically. With the lock off, width and height are fully independent and the image can stretch into a funhouse mirror. Keep it on unless distortion is genuinely what you want.
Can I make an image bigger?
Yes, but expect softness — upscaling cannot create detail that was never captured, it can only smooth what is there. Modest enlargements (up to about 1.5×) usually look acceptable; beyond that, hunt down the original at higher resolution instead of stretching a small file past its limits.
Is my image uploaded?
No. The browser decodes your file, redraws it at the new dimensions on a canvas, and encodes the result — all locally on your device. The original file is never modified, never transmitted and never seen by anyone but you.
Conclusion
Right size, right format, no stretching, no uploading. Type the pixels your destination demands, keep the ratio lock on, glance at the preview, and download the copy — the whole job takes under a minute.