CONVERT
AVIF → XPM
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Fast, secure AVIF to XPM conversion. No registration required.
Setup: AVIF is the AV1-based next-gen image codec, extremely efficient with full HDR and alpha support. Goal: an interchangeable XPM. If you have ended up with a AVIF and need a XPM, the mismatch is almost always about where the image is going next rather than the picture itself. Our server reads the AVIF with ImageMagick, decodes each pixel, and re-writes it as a XPM using defaults tuned for fidelity first and file size second. Context: AVIF is the AV1-based next-gen image codec, extremely efficient with full HDR and alpha support. XPM is a raster image format with its own balance of compression, colour depth, and software support.
AVIF Image
Source formatAVIF is a next-generation image format based on the AV1 video codec. It offers significantly better compression than JPEG and WebP while maintaining excellent visual quality, including HDR and wide color gamut support.
X PixMap
Target formatXPM (X PixMap) is a color image format for the X Window System that stores pixel data as ASCII text with a color palette. Unlike XBM, it supports full color and transparency through a simple text-based representation.
Why convert AVIF to XPM
Both AVIF and XPM describe a grid of pixels — the difference lies in how that grid is compressed, whether transparency is supported, and which software opens it natively. Moving from AVIF to XPM is worth it when the XPM ecosystem is broader for your use case, or when XPM compresses photographs more efficiently than AVIF.
HOW TO CONVERT
AVIF → XPM
Drop the AVIF file
Drag and drop or click to upload your AVIF. The image is transferred securely over HTTPS and queued for conversion.
Re-encode with ImageMagick
ImageMagick decodes every pixel of the AVIF and writes a matching XPM with sensible default quality settings.
Download the XPM
The converted XPM is ready to download as a single file; both files delete automatically within two hours.
Common Use Cases
Web publishing and CMSes
XPM uploads cleanly to WordPress, Ghost, Webflow and most blogging platforms; many CMSes silently transcode or reject AVIF.
Email attachments
Email clients preview XPM inline while AVIF may arrive as an unrecognised attachment on older Outlook or mobile apps.
Social media uploads
Platforms like Instagram, X and Facebook accept XPM natively; AVIF is often rejected or silently converted with unpredictable results.
Design hand-off
Designers shipping assets to developers prefer XPM for faster pipeline imports and consistent display across build tools.
AVIF vs XPM — Strengths and limitations
What each format does best, and where it falls short.
AVIF Strengths
- Best-in-class compression efficiency — 30-50% smaller than JPEG for the same quality.
- Royalty-free and patent-unencumbered (unlike HEIC).
- Supports alpha transparency, HDR, wide gamut (BT.2020), and up to 12-bit color.
- Progressive decoding: a blurry preview appears while the file is still downloading.
- Supported in all major browsers since late 2022 — no polyfills needed.
Limitations
- Encoding is CPU-expensive — an AVIF export can take 10-30× longer than JPEG.
- Older software (pre-2022) cannot open AVIF without plugins.
- Email clients still largely ignore it — stick to JPEG for attachments.
XPM Strengths
- Valid C source — directly embeddable in code.
- Text-editable in any editor.
- Transparency via "None" color value.
- Stable since 1989 with no breaking changes.
Limitations
- Enormous file sizes vs compressed formats.
- Only useful within X11 / legacy Unix GUI ecosystem.
- Limited color palette in classic form (256 colors max practical).
AVIF vs XPM — Technical specifications
Side-by-side comparison of the technical details.
AVIF
- MIME type
- image/avif
- Container
- HEIF (ISOBMFF)
- Codec
- AV1 (intra-only)
- Max dimensions
- 65 536 × 65 536 px
- Color depth
- Up to 12-bit per channel
- Color spaces
- sRGB, Display-P3, BT.2020, arbitrary ICC
XPM
- MIME type
- image/x-xpixmap
- Extension
- .xpm
- Encoding
- ASCII text (valid C source)
- Native environment
- X Window System (X11)
- Predecessor
- .xbm (X Bitmap, 1-bit)
| Specification | AVIF | XPM |
|---|---|---|
| MIME type | image/avif | image/x-xpixmap |
| Container | HEIF (ISOBMFF) | — |
| Codec | AV1 (intra-only) | — |
| Max dimensions | 65 536 × 65 536 px | — |
| Color depth | Up to 12-bit per channel | — |
| Color spaces | sRGB, Display-P3, BT.2020, arbitrary ICC | — |
| Extension | — | .xpm |
| Encoding | — | ASCII text (valid C source) |
| Native environment | — | X Window System (X11) |
| Predecessor | — | .xbm (X Bitmap, 1-bit) |
AVIF vs XPM — Typical file sizes
Approximate file sizes for common scenarios.
AVIF
- Thumbnail (400px) 10-30 KB
- Web photo (1920px) 80-300 KB
- 4K photo (3840px) 300 KB - 1.2 MB
- Lossless copy of 24MP photo 8-15 MB
XPM
- Small icon (32×32, 16 colors) 2-5 KB
- Toolbar button set 10-50 KB
Quality & Compatibility
If XPM is a lossless format (PNG, TIFF, BMP) the output keeps every pixel of the decoded AVIF exactly. If XPM is a lossy codec (JPEG, WebP, HEIC), the encoder re-compresses the image at the quality level you select — default 85 is transparent for photographs, quality 92+ for illustrations with hard edges.
Tips for Best Results
- Keep the original AVIF alongside the XPM output — re-encoding already-lossy images accumulates detail loss on each round.
- If the XPM will be uploaded to a CMS, check whether the platform has a max dimension and downscale once on export rather than letting the CMS resize automatically.
- For thumbnails and avatars, export the XPM at exactly the display size; browsers will otherwise resample and the image may look soft.
Frequently Asked Questions
It depends on the codecs involved. If both AVIF and XPM are lossy, the pixels are re-encoded and a small amount of detail is discarded — invisible at default quality settings on photographs. If XPM is lossless (PNG, TIFF, BMP) the output keeps every pixel of the decoded AVIF exactly, but cannot recover detail that AVIF had already compressed away.
Often yes, especially when XPM is lossless. AVIF tuned for efficient web delivery will usually produce smaller files than XPM's default settings. If file size matters, drop the quality in Advanced or pick a more compressed target format instead.
KaijuConverter uploads over HTTPS, processes the image in an isolated container and deletes both the source and the output within two hours. No account is required, file contents are never logged, and we do not use uploads to train any model. For confidential material, the paid plan includes a data-processing agreement.
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Read guideSecure & Private Conversion
Your files are encrypted during transfer, processed in isolated containers, and automatically deleted within 60 minutes. We never read, share, or store your data.