PNG to PAM Converter
Convert PNG to PAM in your browser. PNG files usually come from screenshots, design exports, logos and web graphics; PAM is the better fit for image processing pipelines that need alpha. You get an 8-bit PAM, RGB, or RGB_ALPHA when the image has transparency. Nothing is uploaded.
- Processed locally
- No upload, no wait
- No sign-up
- No watermark
Drop images here
or choose files · paste with Ctrl/⌘ V
PNG expected · other image formats also work
How to use PNG to PAM
- 1
Add your PNG files: drop them here, choose them, or paste from the clipboard.
- 2
There is nothing to tune: the PAM is written uncompressed. Resizing and rotating are under More options if you need them.
- 3
Click Convert. Each file is decoded and encoded in a background thread on this device.
- 4
Download the .pam files one at a time or together as a ZIP.
Why use Aback Images for png to pam
Where the PAM goes next
PAM opens in Netpbm, ImageMagick, FFmpeg and Photoshop.
PAM next to PNG
The PAM is written uncompressed, so expect it to be several times larger than the PNG, which stores lossless DEFLATE with a prediction filter chosen per row.
Written without a lossy pass
The PAM is written uncompressed, so the pixels decoded from the PNG arrive unchanged, apart from precision beyond 8 bits per channel.
Processed on your device
Your images are decoded, edited and encoded inside this browser tab by Web Workers. Nothing is uploaded to a server.
PNG vs PAM
What changes from PNG to PAM
Encoding: the PNG uses lossless DEFLATE with a prediction filter chosen per row; PAM uses none, and the download is an 8-bit PAM, RGB, or RGB_ALPHA when the image has transparency.
Bit depth: 1, 2, 4, 8 or 16 bits per channel in the PNG; PAM allows 8 or 16 bits per channel, and the PAM written here has 8 bits per channel. 16-bit PNGs from photo and scientific software are reduced to 8 bits per channel.
Colour: RGB, greyscale, or an indexed palette of up to 256 colours in the PNG; PAM supports greyscale or RGB, as declared by the TUPLTYPE line, written here as 8-bit sRGB.
Transparency: the PNG stores it as a full alpha channel, so edges and shadows can fade smoothly; the PAM keeps it as an extra channel declared as GRAYSCALE_ALPHA or RGB_ALPHA.
Metadata: the PNG can carry text chunks, an ICC profile, physical resolution and EXIF in an eXIf chunk; PAM can carry only comment lines in the header, but nothing is copied across.
About PNG
PNG stores pixels losslessly with full alpha transparency. It is ideal for screenshots, logos, UI and anything with sharp edges, but photos saved as PNG are several times larger than JPEG.
A PNG opens with an 8-byte signature and is a chain of chunks, each with its own CRC: IHDR (size, depth, colour type), optional PLTE and tRNS for palettes, one or more IDAT chunks with the compressed rows, and IEND.
PNG files usually come from screenshots, design exports, logos and web graphics.
About PAM
PAM is the general member of the Netpbm family: an uncompressed format with a self-describing header that can hold greyscale, RGB and alpha channels at 8 or 16 bits.
A PAM file starts with 'P7', then header lines WIDTH, HEIGHT, DEPTH (channels), MAXVAL and TUPLTYPE (for example RGB_ALPHA), closed by ENDHDR, followed by the raw samples row by row.
When converting PNG to PAM makes sense
PAM is the better choice for image processing pipelines that need alpha, while PNG suits screenshots, logos, graphics and anything that needs transparency.
PAM strengths: Alpha channel, unlike PPM; Trivial to parse; 8 or 16 bits per channel. Drawbacks to weigh: Uncompressed and large; Few apps outside Netpbm and ImageMagick know it.
Limitations
- PAM keeps an alpha channel, unlike PPM, so tools that only know binary PPM cannot read it.
- Files are uncompressed at 4 bytes per pixel with alpha.
More conversions
Related tools
Convert PAM to PNG in your browser, ready for screenshots, logos, graphics and anything that needs transparency. Batch, private, no uploads.
Convert PNG to JPG in your browser, with transparency filled in a colour you pick. Batch, private, no uploads.
Convert PNG to WebP in your browser, ready for images on websites and in apps. Batch, private, no uploads.
Convert PNG to AVIF in your browser, ready for maximum compression on modern websites. Batch, private, no uploads.
Convert PNG to PDF in your browser, one PDF page per image. Batch, private, no uploads.
Convert PNG to ICO in your browser, multi-size icons for favicons and Windows. Batch, private, no uploads.
Convert PNG to SVG in your browser, traced into real vector paths. Batch, private, no uploads.
Convert PNG to EPS in your browser, with transparency filled in a colour you pick. Batch, private, no uploads.
Frequently asked questions
Does converting PNG to PAM lose quality?
PAM is written uncompressed, so the pixels are stored exactly as decoded. 16-bit PNGs from photo and scientific software are reduced to 8 bits per channel.
Is transparency kept in the PAM?
Yes. PNG stores it as a full alpha channel, so edges and shadows can fade smoothly, and the PAM is written with an alpha channel, so transparent areas stay transparent.
Which apps open PAM files?
Netpbm, ImageMagick, FFmpeg and Photoshop. It does not open in web browsers.
Are my images uploaded anywhere?
No. Processing happens inside your browser with WebAssembly and Web Workers. The site only downloads the app code and codecs; your files never leave your device. You can confirm this with the live upload counter on the tool, or in your browser's network panel.
Can I process many files at once?
Yes. Drop a whole selection or folder. Files are processed in parallel on several worker threads, each result can be downloaded on its own, and everything can be saved as one ZIP.
Is it free? Is there a file limit or watermark?
It is free with no account, no watermark and no daily limit. The only limit is your device's memory: very large images (over roughly 100 megapixels) may be refused to keep the tab from crashing.