CONVERT
PCX → AVIF
Fast, secure PCX to AVIF conversion. No registration required.
DRAG. DROP. DONE.
Upload any file and our engines will handle format detection automatically.
Max 100 MB · Free plan · No signup required
Convert to:
Detecting available formats...
Optimize for
Leave empty to use original name. Extension added automatically.
Uploading...
Processing your file...
Opening note — PCX is the legacy ZSoft/PC Paintbrush bitmap format from the DOS era. The AVIF you want is two clicks away. Need a AVIF for a CMS, a chat message or an email client that politely refuses PCX? This tool re-encodes your image in the background and returns a drop-in AVIF replacement. No registration, no watermark, no visual change beyond what the AVIF encoder itself introduces. In practice PCX is the legacy ZSoft/PC Paintbrush bitmap format from the DOS era. On the other end, AVIF is the AV1-based next-gen image codec, extremely efficient with full HDR and alpha support.
PCX Image
Source formatPCX (PiCture eXchange) is a legacy raster image format created by ZSoft for their PC Paintbrush program. It was one of the first widely supported image formats on IBM PC compatibles and uses simple run-length encoding compression.
AVIF Image
Target 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.
Why convert PCX to AVIF
Converting keeps the picture recognisable end-to-end while changing the container that ships it. AVIF typically wins on one of three fronts: broader software support, smaller files for the same visual quality, or features like transparency that PCX cannot express. The conversion itself is fast because both sides are raster formats.
HOW TO CONVERT
PCX → AVIF
Upload your PCX
Start by dropping the PCX onto the uploader. Files up to 100 MB go through on the free tier without registration.
Conversion happens server-side
Our imagemagick-based pipeline reads the PCX pixel grid, preserves resolution and colour profile, and encodes a clean AVIF.
Grab the result
A download button appears as soon as the AVIF is ready. Save locally or share the short-lived URL.
Common Use Cases
Cross-platform previews
Windows, macOS and Linux file browsers all render AVIF thumbnails; PCX support varies by OS version.
Mobile galleries
iOS Photos, Google Photos and Samsung Gallery index AVIF instantly — PCX sometimes falls back to a generic file icon.
Stock photography uploads
Shutterstock, Adobe Stock and similar marketplaces require AVIF in their contributor guidelines.
Archive migration
Converting legacy PCX archives to AVIF future-proofs the collection against declining codec support.
PCX vs AVIF — Strengths and limitations
What each format does best, and where it falls short.
PCX Strengths
- Simple format — easy to parse in any language.
- RLE compression keeps flat-color images compact.
- Historic archive format for 1985-1995 PC art.
- Stable since 1985 with no breaking changes.
Limitations
- Legacy — no new content created as PCX in 2026.
- Inefficient for photographs (RLE is wrong algorithm).
- Limited to 24-bit color depth.
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.
PCX vs AVIF — Technical specifications
Side-by-side comparison of the technical details.
| Specification | PCX | AVIF |
|---|---|---|
| MIME type | image/x-pcx | image/avif |
| Extension | .pcx | — |
| Header | 128 bytes fixed | — |
| Compression | Run-Length Encoding (RLE) | — |
| Creator | ZSoft Corporation (1985) | — |
| 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 |
PCX vs AVIF — Typical file sizes
Approximate file sizes for common scenarios.
PCX
- Simple clipart 2-40 KB
- VGA-era screenshot (320×200) 30-80 KB
- Scanned page 200 KB - 2 MB
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
Quality & Compatibility
Converting keeps resolution, aspect ratio and colour profile identical to the source. Metadata (EXIF, XMP) transfers where AVIF supports it; otherwise it is dropped. If the PCX contained an alpha channel and AVIF does not support transparency, the background is flattened to white by default.
Tips for Best Results
- When uploading to Retina / high-DPI contexts, render the AVIF at 2× the CSS pixel size; the crispness gap over 1× is noticeable on modern screens.
- Strip EXIF metadata from the AVIF before publishing if the PCX came from a phone camera — it often contains GPS coordinates and device IDs.
- If the PCX is a screenshot of text or UI, prefer a lossless AVIF target to avoid the JPEG-style ringing around glyph edges.
Frequently Asked Questions
Frequently Asked Questions
It depends on the codecs involved. If both PCX and AVIF are lossy, the pixels are re-encoded and a small amount of detail is discarded — invisible at default quality settings on photographs. If AVIF is lossless (PNG, TIFF, BMP) the output keeps every pixel of the decoded PCX exactly, but cannot recover detail that PCX had already compressed away.
Often yes, especially when AVIF is lossless. PCX tuned for efficient web delivery will usually produce smaller files than AVIF'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.
RELATED CONVERSIONS
Other popular pairs involving PCX or AVIF
More from PCX
More ways to reach AVIF
Related comparisons
See these formats side by side to understand which fits your use case best.
Related Guides
AVIF Image Format: AV1-Powered Next-Generation Compression
Complete guide to AVIF image format: AV1 intra-frame compression, HEIF container, HDR and wide color gamut support, avifenc/ffmpeg encoding, browser compatibility, and comparison with WebP/JPEG/HEIC.
Read guideAVIF: AV1 Image Format & Next-Generation Compression
Complete guide to AVIF image format: AV1 codec, 50% better compression than JPEG, HDR support, color gamut, and browser compatibility.
Read guideAVIF Image Format Guide
AVIF image format guide: AV1 codec, 20-50% better compression than WebP, HDR support, 10-bit color depth, wide gamut, modern browser support. When to use AVIF vs WebP.
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.