PNG Compressor
Compress images to PNG format and reduce file size while maintaining quality. Perfect for optimizing images for web, email, or storage. Converts any image format to optimized PNG with transparency support.
Supported formats: JPEG, PNG, WebP, GIF, BMP, TIFF, ICO, TGA, PSD, EPS, SVG, and more. All images will be converted to PNG format. Recommended: up to 20MB per image. Maximum: ~50MB.
Table of Contents
What is PNG Compression?
PNG compression is the process of reducing the file size of an image by converting it to PNG format and applying lossless compression algorithms. PNG (Portable Network Graphics) is a widely-used image format that uses lossless compression to achieve smaller file sizes while maintaining perfect image quality.
Our PNG compressor accepts images in various formats (JPEG, WebP, GIF, BMP, TIFF, etc.) and converts them to optimized PNG format. This is particularly useful when you need to preserve transparency, maintain perfect image quality, or standardize image formats for web use where PNG is preferred.
Unlike lossy compression formats like JPEG, PNG compression is lossless, meaning no image data is lost during compression. This makes PNG ideal for images with sharp edges, text, graphics, logos, and any image where transparency needs to be preserved.
How it Works
Our PNG compressor processes your images and converts them to optimized PNG format. Here's how it works:
- Upload: Select an image file from your device (any image format is supported)
- Configure: Optionally set a maximum width for resizing
- Convert & Compress: Our server converts the image to PNG format and applies optimized lossless compression algorithms
- Download: Get your compressed PNG image with reduced file size, ready to use
The compression and format conversion happens entirely on our secure servers. Your original image is never stored, and the compressed PNG version is only available for download during your session.
Compression Settings
Maximum Width
Setting a maximum width resizes your image while maintaining its aspect ratio. This is useful for:
- Reducing file size by decreasing pixel dimensions
- Optimizing images for specific display sizes
- Creating thumbnails or smaller versions of images
If you leave this empty, the image will keep its original dimensions and only the lossless compression will be applied during the PNG conversion.
Lossless Compression
PNG uses lossless compression, which means:
- No image quality is lost during compression
- Every pixel is preserved exactly as in the original
- Transparency (alpha channel) is fully supported
- Perfect for graphics, logos, and images with sharp edges
The compression algorithm optimizes the file structure and removes redundant data without losing any visual information.
Common Use Cases
- Transparency Preservation: Convert images to PNG to maintain transparency, perfect for logos and graphics that need to overlay on different backgrounds
- Format Standardization: Convert JPEG, WebP, or other formats to PNG for consistent image formats across your project
- Website Optimization: Reduce PNG file sizes to improve page load times and SEO rankings while maintaining perfect quality
- Graphics & Logos: Optimize graphics, logos, and images with sharp edges where lossless compression is essential
- Email Attachments: Compress and convert images to PNG before sending to reduce email size
- Social Media: Optimize images for platforms that support PNG format with transparency
- Storage Savings: Reduce storage space needed for image collections by converting to compressed PNG
- Mobile Optimization: Create smaller PNG images for mobile apps and responsive websites
- E-commerce: Optimize product images to PNG format for faster loading on online stores
- Blog Posts: Convert and compress images to PNG for blog articles to improve reader experience
Best Practices
Resize Before Compressing
If your image is larger than needed, set a maximum width to resize it first. This often results in better file size reduction than compressing a large image at full resolution.
Keep Originals
Always keep a copy of your original uncompressed images. While PNG is lossless, once an image is converted to PNG, you cannot restore the original format. Save compressed versions with different names.
When to Use PNG
PNG is ideal for:
- Graphics with transparency - PNG is the best format for images that need transparent backgrounds
- Text and sharp edges - PNG preserves sharp edges perfectly without compression artifacts
- Logos and icons - Small graphics with few colors compress very well in PNG
- Images with few colors - PNG can use indexed color mode for better compression
Consider using JPEG instead if you have:
- Photographs - JPEG typically produces smaller files for photos
- Complex images with many colors - JPEG compression works better for detailed photos
- No transparency needs - If you don't need transparency, JPEG may be more efficient
Note: Our PNG compressor will convert JPEG photos to PNG, but the file size may be larger than the original JPEG. PNG is best suited for graphics, not photographs.
Frequently Asked Questions
We support a wide range of input formats that can be converted to PNG, including:
- Raster formats: JPEG, JPG, PNG, WebP, GIF, BMP, TIFF, TIF, ICO, TGA, PSD (Adobe Photoshop), EPS
- Vector formats: SVG (converted to raster first, then to PNG)
- Other formats: Any format that Pillow can read
All images will be converted and compressed to PNG format as output.
Recommended: Up to 10-20MB per image for best performance and reliability.
Maximum: Approximately 50MB per image. However, very large images may timeout or run out of memory, especially on free tier hosting.
Limitations: The actual limit depends on several factors:
- Server memory limits
- Image processing memory usage
- Image dimensions (very high resolution images consume more memory)
If your image is larger than 20MB, consider resizing it first or using image editing software to reduce the dimensions before compressing.
No! PNG uses lossless compression, which means no image quality is lost during compression. Every pixel is preserved exactly as in the original image. This is different from JPEG compression, which is lossy and may introduce some quality loss.
Yes! PNG format fully supports transparency (alpha channel). If you upload an image with transparency, it will be preserved in the compressed PNG. If you upload an image without transparency (like a JPEG), the PNG will not have transparency, but you can add it using image editing software.
No. Your images are processed temporarily on our servers and then immediately deleted. We don't store, save, or share your images. The compressed PNG image is only available for download during your session.
If your image is larger than needed for its intended use, yes! Resizing to the maximum width you need before compressing will result in better file size reduction. For example, if you only need a 1200px wide image for a website, set the maximum width to 1200px rather than compressing a 4000px wide image.
PNG:
- Uses lossless compression - preserves all image data perfectly
- Best for images with sharp edges, text, or transparency needs
- Supports transparency (alpha channel)
- Generally produces larger file sizes for photographs
- Widely supported across all platforms and browsers
JPEG:
- Uses lossy compression - reduces file size by discarding some image data
- Best for photographs and complex images with many colors
- Does not support transparency
- Generally produces smaller file sizes for photos
- Also widely supported
Our PNG Compressor is specifically designed to convert any image to optimized PNG format, making it perfect when you need PNG output specifically, especially for graphics, logos, or images requiring transparency.
No! Since PNG uses lossless compression, the compressed image will look exactly the same as the original. Every pixel is preserved perfectly. However, if you're converting from a lossy format like JPEG, you may notice that the PNG file size is larger than the original JPEG, as PNG cannot restore the quality that was lost during JPEG compression.