640 × 480
86.3 KBsample-640x480.png
Small lossless PNG for quick upload and preview tests.
- 640 × 480 px
- VGA, 4:3
- 24-bit RGB
.PNG
Sample PNG Images
Lossless PNG images with full and partial transparency, high bit depth and the smallest possible file. Built for testing image pipelines, not just viewing.
.pngimage/png10 filesFree · No sign-upUnlimited downloads
Custom size
by Technology Channel · Free to use for testing and development, including commercial projects.
1920 × 1080Popular
274 KBsample-1920x1080.png
Lossless Full HD image. Compare against JPG for quality and size tests.
- 1920 × 1080 px
- Full HD, 16:9
- 24-bit RGB
3840 × 2160
487 KBsample-3840x2160.png
Large lossless 4K PNG for memory, resize and decode-time tests.
- 3840 × 2160 px
- 4K UHD, 16:9
- 24-bit RGB
Transparent icon
5.0 KBsample-transparent-512x512.png
512 × 512 icon with full and partial transparency (alpha ramp). Check backgrounds, borders and compositing.
- 512 × 512 px
- RGBA
- Alpha channel
Transparent landscape
41.0 KBsample-transparent-1920x1080.png
Mountains on a fully transparent sky. Useful for layering, background-color and compositing tests.
- 1920 × 1080 px
- RGBA
- Alpha channel
About 1 MB
958 KBsample-1mb.png
Lossless image a little under 1 MB. Use it for upload-size checks.
- 900 × 600 px
- 958 KB
- 24-bit RGB
About 5 MB
4.7 MBsample-5mb.png
Lossless image a little under 5 MB. Use it for upload-size checks.
- 2017 × 1345 px
- 4.7 MB
- 24-bit RGB
8-bit palette
40.1 KBsample-8bit-palette.png
Indexed-color PNG with a 256-color palette. Tests palette decoding and color conversion.
- 1280 × 720 px
- Indexed
- 256 colors
16-bit grayscale
1.2 KBsample-16bit-grayscale.png
Smooth 16-bit gradient. Shows banding if your pipeline drops to 8-bit.
- 1024 × 256 px
- 16 bits per sample
- Edge case
1 × 1 transparent pixel
1 × 1 transparent pixel
70 Bsample-1x1.png
The smallest possible image. Tests minimum-size validation and tracking-pixel handling.
- 1 × 1 px
- RGBA
- Edge case
Exact-size generator
Need a PNG of a different size?
Create a valid PNG file of any exact size, byte for byte, right in your browser. Nothing is uploaded, and you can generate as many as you like.
- Perfect for upload limits: 9.99 MB, 10 MB and 10.01 MB in seconds.
- Up to 20 copies at once, bundled in one ZIP.
- Unique copies get different checksums, for duplicate-detection tests.
Use cases
What you can test
- Alpha blending on light and dark backgrounds.
- Lossless round trips: the output should match the input pixel for pixel.
- Palette (indexed) PNG decoding and conversion.
- 16-bit to 8-bit conversion and banding.
- Minimum dimension validation with the 1×1 pixel.
- Upload size limits with the 1 MB and 5 MB files.
Reference
PNG format facts
| Extension | .png |
|---|---|
| MIME type | image/png |
| File signature | 89 50 4E 47 0D 0A 1A 0A (.PNG....) |
| Origin | PNG Development Group, 1996 · ISO/IEC 15948 |
| Files here | 10 · 6.5 MB in total |
| License | Free for any use, no attribution |
About the format
What is a PNG file?
PNG (Portable Network Graphics) appeared in 1996 as a patent-free replacement for GIF. It is lossless, supports an alpha channel for transparency and allows 1 to 16 bits per channel.
Because it is lossless, PNG suits screenshots, icons, logos and interface assets. Photos are usually much larger as PNG than as JPG or WebP.
Developers
Check transparency in HTML
Check transparency in HTML
<div style="background:#000;padding:24px">
<img src="files/png/sample-transparent-512x512.png"
width="256" height="256" alt="Transparent PNG icon">
</div>Download with cURL
curl -O https://samplefiles.technologychannel.org/files/png/sample-640x480.pngFAQ
PNG files: common questions
Which files are transparent?
The 512 × 512 icon and the transparent landscape both have an alpha channel. The icon also includes a gradient from opaque to fully transparent for testing partial alpha.
Why is the 4K PNG so much larger than the 4K JPG?
PNG is lossless, so it keeps every pixel exactly. JPG discards detail you are unlikely to notice, which makes photos much smaller.
Can I use these images in commercial projects?
Yes. Every image here is free for any use, including commercial testing, demos and tutorials. No attribution is required.
Can I download the same image more than once?
Yes, as many times as you like. There is no sign-up, no daily limit and no waiting timer. Direct links also work in scripts, CI jobs and automated tests.
Keep testing
All 20 formats