Resize PNG Online Free. Keep Transparency, Exact Pixels
Most image resizers convert your PNG to JPG and destroy the transparent background. This tool resizes PNG files while keeping the alpha channel (transparency) completely intact: perfect for logos, icons, stickers, and any graphic that needs a clear background.
Supported media processing runs in your browser. Supported local media processing, no signup, no watermark.
How to Resize a PNG Without Losing Transparency (3 Steps)
- Upload your PNG: drag it onto the tool or click to browse. Multiple files are supported for batch resizing.
- Set the dimensions: enter exact width and height in pixels, or scale by percentage. Toggle "Lock aspect ratio" to avoid stretching.
- Download the resized PNG: transparency is preserved in the output file. Download all at once as a ZIP if you processed multiple images.
Why Resizing PNG Requires a Different Approach Than JPG
PNG files use lossless compression and support full alpha channel transparency. When you resize a PNG:
- Transparency must be preserved: any tool that converts to JPG during resizing will fill transparent areas with white or black. This tool keeps the alpha channel.
- Lossless output: unlike JPG resizers that recompress and degrade quality, this tool outputs a clean PNG with no generation loss.
- Anti-aliasing on edges: transparent logos and icons have soft semi-transparent pixels on their edges. Good resampling respects these sub-pixel values.
Common PNG Resizing Use Cases
- App icons: resize a single source PNG to required dimensions (16×16, 32×32, 64×64, 128×128, 256×256, 512×512) for different platforms.
- Logo scaling: scale a high-resolution transparent logo down to fit website headers, email signatures, or presentations.
- Favicon preparation: resize your logo PNG to 32×32 or 16×16 pixels for use as a browser favicon.
- Social media graphics: resize transparent overlays and watermarks to match specific platform dimensions.
- Print design: upscale a PNG for print while maintaining transparency for overlay layers in InDesign or Illustrator.
- Sticker sheets: batch resize multiple PNG stickers to a uniform size for printing or digital distribution.
Upscaling vs Downscaling PNG
The direction you resize matters:
- Downscaling (making smaller). Produces excellent results. The Lanczos resampling algorithm blends neighboring pixels intelligently, keeping edges sharp and details clear.
- Upscaling (making larger). Some quality loss is inevitable because you are adding pixels that don't exist. Standard upscaling creates a smooth result. For AI-powered upscaling that adds detail, try the Image Upscaler.
Frequently Asked Questions
- Will the transparent background stay transparent after resizing?
- Yes. This tool is specifically built to preserve alpha channel transparency in PNG files. Your transparent areas remain fully transparent in the output.
- Can I resize to non-square dimensions without distorting the image?
- Yes. Enable "Lock aspect ratio" to maintain the original proportions. If you enter only width, the height is calculated automatically, and vice versa.
- What is the maximum PNG size I can resize?
- There is no server-side file size limit because processing happens in your browser. In practice, PNG files up to several hundred megabytes resize without issues on most modern devices.
- Can I resize multiple PNG files at once?
- Yes. Drop multiple PNG files to resize them all to the same dimensions at once, then download as a ZIP archive.
- Should I use PNG or WebP for my resized image?
- PNG is best when you need guaranteed transparency support across all platforms (email, older apps, print). WebP offers better compression but has slightly less universal compatibility. For web-only use with modern browsers, WebP is a good choice.
Other Resize Formats
- Resize Image: resize JPG, PNG, WebP, AVIF and any other format
- Resize JPG. Resize JPEG photos with quality control