Image Resizer — Private & Exact
Resize any JPG, PNG, or WebP to exact pixels, a percentage, or ready-made social media sizes — with aspect-ratio lock and format conversion. Your image never leaves your browser.
Drop an image here or click to browse
JPG, PNG, or WebP · resized right here in your browser, nothing is uploaded.
How to resize an image
- Drop a JPG, PNG, or WebP image into the box above (or click to browse).
- Pick a mode: exact pixels (with aspect-ratio lock), percent scaling, or a social preset that center-crops to the platform's exact size.
- Optionally change the output format — JPEG, PNG, or WebP.
- Click Resize Image, check the new dimensions and file size, and download.
Not sure which dimensions each platform wants this year? See the complete social media image size cheat sheet
Frequently Asked Questions
Are my images uploaded to a server?▼
No. The resize happens entirely in your browser using the canvas API — the image never leaves your device. That makes it safe for private photos, ID scans, and client work, and it works offline once the page has loaded.
How do the social media presets crop my image?▼
The image is scaled just enough to completely cover the preset dimensions, then center-cropped to the exact size — the same behavior as CSS object-fit: cover. You get a pixel-perfect 1080×1080 Instagram post or 1280×720 YouTube thumbnail with no stretching or letterboxing.
Will resizing reduce image quality?▼
Downscaling uses high-quality smoothing and usually looks excellent. Enlarging beyond 100% cannot invent detail, so expect some softness above roughly 150%. JPEG and WebP output are encoded at 0.92 quality, a good balance of sharpness and file size; choose PNG for lossless output.
What happens to transparency when I convert PNG to JPEG?▼
JPEG has no alpha channel, so transparent areas are filled with white before encoding (not black, which is what many tools do by accident). If you need to keep transparency, choose PNG or WebP as the output format.
Does resizing make the file smaller?▼
Usually, yes — file size scales roughly with pixel count, so halving both dimensions can cut the size by 70% or more. If your goal is a specific file size in KB rather than specific dimensions, our Image Compressor tool targets exact file sizes instead.