PNG Tools
Free online PNG tools for converting, compressing, resizing, and editing PNG images — no software required.
About PNG Files
PNG (Portable Network Graphics) is a lossless image format designed for the web. Unlike JPEG, PNG compression never discards image data — what you save is exactly what you get back, every time, no matter how many times you open and re-save the file. That makes it the right choice whenever quality and precision matter more than file size.
When to Use PNG
PNG excels in situations where image integrity is non-negotiable:
- Graphics with text or sharp edges — logos, diagrams, screenshots, and UI elements stay crisp because there's no compression blurring around high-contrast boundaries
- Transparency — PNG supports a full alpha channel, meaning individual pixels can be fully transparent, fully opaque, or anywhere in between; JPEG has no transparency support at all
- Images you plan to edit — because PNG is lossless, editing and re-saving never compounds quality loss the way repeated JPEG saves do
- Screenshots and screen recordings — pixel-perfect accuracy is preserved, which matters when documenting software or capturing UI states
- Illustrations and flat-color graphics — areas of solid color compress extremely efficiently in PNG without the color banding that appears in JPEG
PNG vs. JPEG: Choosing the Right Format
The choice between PNG and JPEG comes down to what's in the image and how it will be used.
JPEG uses lossy compression tuned for photographs. The algorithm discards subtle color variation that the human eye doesn't easily detect in complex natural scenes — it works well for photos but poorly for anything with text, sharp lines, or flat colors. Every JPEG save introduces artifacts; save the same image ten times and quality degrades noticeably.
PNG uses lossless compression. File sizes are larger than JPEG for photographs, but for graphics, illustrations, and anything requiring a transparent background, PNG is the clear winner. There's no quality tradeoff, no artifacts, and no degradation over time.
A useful rule of thumb: if the image came from a camera or looks like a photo, JPEG is probably fine. If the image was created digitally, contains text, or needs a transparent background, PNG is the better choice.
PNG vs. WebP
WebP is a modern format developed by Google that supports both lossy and lossless compression, as well as transparency. Lossless WebP files are typically 25–35% smaller than equivalent PNGs, and lossy WebP with transparency outperforms JPEG in most scenarios.
WebP is now supported by all major browsers, making it a strong choice for web delivery. For production websites, converting PNGs to WebP can meaningfully reduce page load times. For archival purposes or maximum compatibility — particularly with older software, print workflows, or contexts where browser support isn't guaranteed — PNG remains the safer choice.
PNG Transparency Explained
One of PNG's most useful features is its alpha channel, which controls the transparency of each pixel independently. A pixel's alpha value ranges from 0 (fully transparent) to 255 (fully opaque), with everything in between being semi-transparent.
This enables effects that JPEG simply can't reproduce: logos that sit cleanly on any background color, UI elements that layer naturally over other content, and images with soft drop shadows or smooth anti-aliased edges. When a PNG with transparency is placed on a white background it looks one way; on a dark background it looks another — the image itself hasn't changed, just the context it's displayed in.
GIF also supports transparency, but only binary transparency — each pixel is either fully transparent or fully opaque, with no semi-transparency. PNG's full alpha channel produces far cleaner results, especially around curved or anti-aliased edges.
Frequently Asked Questions
Does PNG support animation?
Standard PNG does not support animation. APNG (Animated PNG) is an extension that adds animation support and is widely supported in modern browsers, but it's a separate specification from standard PNG.
Why are PNG files larger than JPEGs?
PNG uses lossless compression, which preserves all image data. JPEG uses lossy compression that discards information the eye is unlikely to notice, producing smaller files at the cost of some quality. For photographs, JPEG is often far smaller with acceptable quality. For graphics and transparent images, PNG is the appropriate choice regardless of size difference.
Can I convert a JPEG to PNG without quality loss?
Converting JPEG to PNG won't recover quality that was already lost during the original JPEG compression — it just wraps the degraded JPEG data in a lossless container. If the JPEG already has artifacts, those artifacts will be preserved in the PNG. Always keep original uncompressed or PNG source files when quality matters.
What is the maximum color depth PNG supports?
PNG supports up to 48-bit color (16 bits per channel for RGB) and 16-bit grayscale, as well as 8-bit indexed color for palette-based images. For most web and screen use, 8 bits per channel (24-bit RGB or 32-bit RGBA with transparency) is standard.
Is PNG good for print?
PNG can be used for print but is not the preferred format in professional print workflows, which typically use TIFF or PDF. PNG doesn't support CMYK color mode, which is standard for offset printing. For web graphics that will occasionally be printed, PNG works fine. For professional print production, consult with your printer about their preferred format.