DOC vs WEBP
A detailed comparison of Word Document (Legacy) and WebP Image — file size, quality, compatibility, and which format to choose for your workflow.
Word Document (Legacy)
Documents & TextDOC is the legacy binary format used by Microsoft Word 97-2003. While superseded by DOCX, many archived and legacy documents still use this format and require conversion for modern editing.
About DOC filesWebP Image
Raster & Vector ImagesWebP is a modern image format developed by Google that provides superior lossless and lossy compression. Files are typically 25-35% smaller than equivalent JPEG or PNG images at the same visual quality.
About WEBP filesStrengths Comparison
DOC Strengths
- Universal compatibility — every Word version since 1997 reads it natively.
- Rich feature set: styles, tables, comments, track changes, embedded OLE objects.
- Binary format means fast loading even on slow machines.
- Well-understood after decades of reverse-engineering — dozens of parsers exist.
WEBP Strengths
- Smaller file sizes than JPEG, PNG, and GIF at equivalent visual quality.
- Single format for lossy photos, lossless graphics, transparency, and animation.
- Full alpha channel support with smaller files than PNG.
- Now universally supported in all modern browsers.
- Open-source reference implementation (libwebp) by Google.
Limitations
DOC Limitations
- Legacy format — Microsoft stopped improving it in 2007; new features require DOCX.
- Binary structure is fragile; corruption often makes files unrecoverable.
- Historic malware magnet: embedded macros have spread viruses since the 1990s.
- Not open-standard — DOCX is the ISO-standardized successor.
- Subtle formatting drifts when opened in LibreOffice or Google Docs.
WEBP Limitations
- Some older software and image editors still don't read WebP natively.
- Max dimensions are 16,383 × 16,383 — lower than JPEG or PNG.
- Print workflows rarely support WebP (no CMYK, limited color management).
- Editing tools are less mature than JPEG/PNG; round-tripping can lose quality.
Technical Specifications
| Specification | DOC | WEBP |
|---|---|---|
| MIME type | application/msword | image/webp |
| Container | OLE Compound File (Word 97-2003) | — |
| Standard | MS-DOC [MS-OOPR] (released 2008) | — |
| Successor | .docx (2007) | — |
| Character encoding | UTF-16 LE (Word 97+) | — |
| Compression | — | VP8 (lossy) or VP8L (lossless) |
| Color depth | — | 8 bits per channel |
| Max dimensions | — | 16,383 × 16,383 pixels |
| Transparency | — | Full 8-bit alpha channel |
| Animation | — | Supported since WebP 2012 revision |
Typical File Sizes
DOC
- Short letter 25-50 KB
- 20-page report 150-400 KB
- Book manuscript with images 2-20 MB
WEBP
- Web photo (vs JPEG equivalent) 25–35% smaller
- Transparent logo (vs PNG) 20–30% smaller
- Animated replacement for GIF 60–80% smaller
- Hero banner (1920×1080) 150–400 KB
Ready to convert?
Convert between DOC and WEBP online, free, and without installing anything. Encrypted upload, automatic deletion after 2 hours.
Frequently Asked Questions
DOC is the legacy Microsoft Word binary format used from 1983 to 2007, storing text, images, formatting, and embedded objects in the OLE Compound File container since Word 97. It was replaced as default by DOCX in Office 2007 but remains widely used in legacy archives and older government systems.
DOC files open in every Microsoft Word version from 1997 onward, Google Docs (free), LibreOffice Writer (free), Apple Pages, and most online viewers like OneDrive and Dropbox preview. On iPhone and Android, Word apps open DOC natively.
Use KaijuConverter's DOC-to-PDF converter for a single-click conversion. Microsoft Word, Google Docs, and LibreOffice all export to PDF natively via "Save as PDF" or the print menu — the result is identical and preserves every font, layout, and image.
Always DOCX for new documents. DOCX files are 75% smaller thanks to ZIP compression, follow the ISO/IEC 29500 standard, and support every modern Word feature. DOC is essentially a legacy compatibility format — Microsoft stopped improving it in 2007.
Older DOC files could contain VBA macros that became a common malware vector in the 2000s. Modern Office blocks macros by default. If you receive a suspicious .doc, open it in Google Docs or LibreOffice first — both strip macros automatically during import.
Yes. Open the .doc in Microsoft Word and use Save As → Word Document (.docx). LibreOffice Writer offers the same export. Formatting transfers cleanly in 99% of cases; complex features like some legacy form fields may need minor manual fixes.