PNG Compressor – Compress PNG Images Online for Free

What Is PNG Compressor?

PNG Compressor is a free, browser-based tool for compressing PNG images in batches. Choose your preferred quality level, compress multiple images at once, and download each optimized PNG.

Use this PNG compressor online to reduce PNG file size for screenshots, graphics, icons, and website images before sharing or publishing them. Lower quality settings reduce the number of colors, which generally produces smaller files. This makes the tool useful for optimizing images, saving storage space, and preparing graphics for web use.

Compression runs directly in your browser, so your images are not uploaded to ToolsViewer servers.

How to Use PNG Compressor

Step 1: Add PNG Files
Select one or more PNG images. The tool accepts PNG files only (image/png, .png).

Step 2: Set the Quality
Adjust the quality slider to control compression. The default is around 75%, and lower quality settings generally reduce the number of colors and produce smaller files.

Step 3: Compress
Run the compression process. Each image receives its own result, making it easy to review how the file size has changed.

Step 4: Compare and Download
Use the before-and-after comparison to check the compressed image against the original. When you're satisfied with the result, download the optimized PNG with the -compressed suffix.

PNG Compressor Features

• Online PNG compression: Compress PNG images directly in your browser.
• Batch processing: Compress multiple PNG files in one session.
• Adjustable quality: Use the quality slider, with a default setting of around 75%.
• Individual results: Review the compression result for each file.
• Before-and-after comparison: Check image appearance when a comparison result is available.
• Easy downloads: Save compressed images with a -compressed filename suffix.
• Private processing: Images are processed in your browser rather than uploaded to ToolsViewer servers.

Common Use Cases

Shrink Screenshots

Reduce the size of screenshots and user interface captures before attaching them to documents, emails, or support tickets.

Prepare Website Graphics

Optimize PNG images for website pages where smaller image files can help reduce page weight and improve loading performance.

Batch Compress Multiple Images

Select several PNG files and compress them together instead of processing each image individually.

Find the Right Quality

Adjust the quality slider and run compression again until you find a suitable balance between smaller file size and acceptable image appearance.

Supported Input and Output

PNG Compressor supports the following formats and options:

• Input: PNG images only (image/png, .png), one or multiple files
• Output: Compressed PNG images
• Quality: Adjustable compression setting
• Download: Individual files with a -compressed suffix

What It Does and Does Not Do

PNG Compressor reduces PNG image file sizes directly in your browser and supports batch processing, adjustable quality, and comparison with the original image.

It does not convert PNG to JPG; use a dedicated image conversion tool for that purpose. It also does not provide a server-side image optimization pipeline or CDN.

For the best results, compare each compressed PNG with its original before publishing it, especially when working with detailed screenshots, transparent graphics, or icons where color accuracy matters.

Turning HTML into an image first? Try HTML to PNG or HTML to JPG. Compressing photos? Use JPG Compressor.

FAQ