Resize PNG

How to Resize PNG Images Online

1. Choose Your PNG Files: Drag and drop PNG images onto the page or click "Choose PNG files" — up to 50 at once. The first photo opens in the editor and the rest line up as thumbnails below it; with two or more photos open, "Add more" adds files to the same batch.
2. Set the New Size: In Resize, type a "Width" or "Height" in pixels or percent — with "Keep aspect ratio" on, the other side follows — or pick a "Size preset" (percent of original, a target height, or a platform size such as an Instagram post). The size applies to every photo in the batch.
3. Pick the Output Format (Optional): "Save as" keeps "Same as original" or saves as JPG, PNG, WebP or another format. For JPG, WebP and AVIF output, the "Quality" slider (40–100) trades file size against detail. Resize, Crop, Rotate and Flip all work in the same session, and "Undo" steps back.
4. Download: Click the Download button, which names the output format (for example "Download PNG"), for one photo, or "Download all (.zip)" for a batch — "Download one by one" saves the files separately. PNG files are processed right in your browser, so they are not uploaded. No sign-up, no watermark.

Why Resize PNG Images?

PNG is a lossless raster format defined by W3C, with full 8-bit alpha transparency. Re-encoding a resized PNG does not introduce JPEG-style compression artifacts, so the only quality change comes from the resampling step itself. That makes PNG the right format to resize when you need a smaller pixel grid but cannot tolerate compression noise around hard edges (UI assets, screenshots, logos, line art). Common reasons to resize:

• Hit a platform's exact dimension spec — favicons at 16x16, 32x32, and 192x192, the Apple Touch Icon at 180x180, Android maskable at 512x512, or Open Graph cards at 1200x630 (Meta's recommended size, 1.91:1 aspect ratio).
• Cut page weight without losing transparency — a 4000-pixel hero PNG displayed at 1200 pixels wastes bandwidth and slows Largest Contentful Paint. Downscaling to the rendered size typically shrinks files 5-10x.
• Fit attachment caps — Gmail caps single attachments at 25 MB, and Outlook.com at 20 MB; downscaling a multi-megapixel screenshot fixes "file too large" errors instantly.
• Match design-system grids — product thumbnails at 300x300, hero banners at 1920x1080, sidebar icons at 64x64. Locked aspect ratio prevents the distortion you get when you scale by one dimension only.
• Print at a specific physical size — at 300 DPI a 1200x1800 PNG is exactly 4x6 inches; the resize step sets the pixel grid your print driver expects.
• Strip oversized screen captures — Retina/HiDPI screenshots come out at 2x or 3x the logical resolution; resizing back to 1x makes documentation files manageable.

Common PNG Resize Presets

Resize vs Crop vs Compress — Which Tool Do You Actually Need?

Frequently Asked Questions

Will I lose quality resizing a PNG?

PNG itself is lossless, so re-encoding adds no artifacts — but resampling does. Downscaling produces clean results because the algorithm averages neighboring pixels into one output pixel. Upscaling has to invent pixels that were never captured, so even a good interpolator (bicubic, Lanczos) softens edges. For photographic content, start with the largest source you have and scale down once.

Is transparency preserved?

Yes. PNG supports 8-bit alpha (256 levels of partial transparency), and the resize step keeps the alpha channel intact. Anti-aliased edges on logos, drop shadows, and feathered cutouts come through correctly. If you export to JPG instead, transparency is flattened onto white (the editor notes it and offers a "Keep PNG" button) — pick WebP (always lossy here) if you need transparency in a smaller file.

How do I keep the aspect ratio?

Leave "Keep aspect ratio" (the lock button) on and enter either the width or the height — the other dimension fills in automatically using the source ratio. To deliberately stretch (rare, usually a mistake on photos), unlock the ratio and enter both dimensions manually.

What dimensions should I use for a favicon?

Modern sites ship at least three PNGs: 32x32 for desktop browser tabs, 180x180 for the Apple Touch Icon, and 192x192 plus 512x512 for Android and PWA manifests. A 16x16 PNG is still useful for legacy IE/older Edge support. After resizing, bundle the small sizes into a single.ico with PNG to ICO.

What size should an Open Graph image be?

Meta's documentation recommends 1200 x 630 pixels at a 1.91:1 ratio, with an 8 MB file-size ceiling. The same dimensions work for LinkedIn (technically 1200x627). Twitter/X's "summary large image" card wants 1200 x 675 (16:9). PNG is accepted, but if file weight matters consider exporting to JPG since OG images rarely need transparency.

Why is the resized PNG still large?

Resizing only changes the pixel grid. Pixel count drives most of the file size, but PNG also stores a full alpha channel and uses lossless DEFLATE compression — for photos, the resulting file can still be heavy. If the file is too big after resize, run it through Compress PNG (palette quantization can cut size 5-10x) or convert to PNG to WebP.

Can I resize multiple PNGs to the same dimensions?

Yes — drop up to 50 PNG files at once (a mixed batch works too). The size, format and quality you set apply to every file in the batch; "Download all (.zip)" saves every resized result in one ZIP, and "Download one by one" saves them separately.

What about upscaling — can I make a small PNG larger?

You can, but expect softness. Standard interpolation (bicubic, Lanczos) fills new pixels by averaging existing ones, so detail that wasn't in the source can't reappear. For logos and line art the result is usually acceptable; for photos, a dedicated AI upscaler will do better than any classical resizer.

Are my files uploaded anywhere?

Most images are processed right in your browser and are not uploaded. There's no public link, no account requirement, and no third-party sharing.