PBM to APNG Converter
Processing entirely on your device — large files may take a moment.
PBM is the 1-bit member of the netpbm family: pure black and white, stored as readable ASCII or packed bits. It is the simplest image format that still counts as one — which is why half a century of tools can read it. Convert an animated GIF to APNG to keep smooth color and clean transparency while staying animated.
Because the whole conversion happens on your device, it is instant, unlimited and genuinely private — no accounts, no watermarks, no files on anyone's server. Multiple files are converted in one go.
How PBM compares to APNG
| PBM | APNG | |
|---|---|---|
| Structure | P1 (ASCII) / P4 (binary) header + bits | PNG frames + acTL/fcTL chunks |
| Types / schema | 1-bit black & white | True color + full alpha |
| Compatibility | netpbm, GIMP, ImageMagick | Chrome, Firefox, Safari (all modern) |
| Best for | Print/fax pipelines, 1-bit art | High-quality animation on the web |
How to convert PBM to APNG
- 1
Select your files
Drag & drop your PBM files onto the area above, or click to browse. You can add multiple files at once for batch conversion.
- 2
Convert instantly
Click "Convert to APNG". The conversion runs entirely inside your browser using WebAssembly — no upload, no queue, no waiting.
- 3
Download results
Download each converted APNG file individually, or grab everything at once as a ZIP archive.
About the PBM format
PBM is the 1-bit extreme of the netpbm family: every pixel is a single bit, black or white, stored as ASCII digits or packed bytes. Born as part of Jef Poskanzer's Pbmplus toolkit in 1988, it remains the zero-ambition format of choice for fax pipelines, print queues and anything that must never break.
There is nothing inside a PBM to lose: converting to PNG or JPG is a pure expansion, and converting black-and-white art back down to PBM is the standard way to feed old print systems.
+Strengths
- ✓Trivially parseable — the entire spec fits in a paragraph
- ✓Perfect for 1-bit print and fax pipelines
- ✓Zero patents, zero compression surprises
!Limitations
- −Black and white only — no gray, no color
- −ASCII variant is enormous
- −No alpha channel
About the APNG format
APNG (Animated PNG) is what GIF should have been: the same PNG file format with an animation extension — every frame in full 24-bit color with 8-bit alpha, no 256-color palette, no binary transparency with jagged edges. All modern browsers render it natively.
GIF has one job APNG does better in every dimension: color fidelity and clean transparency for animation. Converting an animated GIF to APNG keeps every frame but upgrades color depth and kills the halo around transparent edges. The only cost is file size — true color costs bytes.
+Strengths
- ✓Full 24-bit color per frame (no 256-color palette)
- ✓8-bit alpha transparency — no jagged edges
- ✓Native rendering in every modern browser
!Limitations
- −Larger files than GIF for the same animation
- −Legacy tools may show only the first frame
- −Not accepted by some social platforms
Why convert PBM to APNG?
Converting makes sense where the strengths of APNG meet what PBM cannot give you. Full 24-bit color per frame (no 256-color palette) Meanwhile Black and white only — no gray, no color One pass through the converter above puts your file on the right side of that trade-off.
Frequently asked questions
Is this PBM to APNG converter really free?
Yes — completely free, with no sign-up, no watermark and no daily conversion limits. The site is supported by advertising.
Are my files uploaded to a server?
No. The conversion runs entirely inside your browser using WebAssembly, so your files never leave your device — that is what makes it instant and private.
Does it work on Windows, Mac, iPhone and Android?
Yes. Anything with a modern browser works: Windows, macOS, Linux, Android and iOS. No software installation is required.
Will I lose quality converting PBM to APNG?
No — APNG is a lossless format, so every pixel of the converted image matches your original PBM file. You can also adjust the quality/size balance before converting when the target format supports compression.
Will transparent areas survive the conversion to APNG?
Transparency is kept whenever APNG actually supports an alpha channel. If the target format has none (like JPG), transparent areas are flattened onto a white background — that is a property of the format, not of this tool.
What happens to EXIF data and other metadata?
Conversions here re-encode the image, and re-encoding generally does not carry the original metadata over. If the EXIF data of your PBM files matters (camera model, GPS, timestamps), keep the original file as the master and treat the converted copy as the shareable version.