DOCX Won't Open? Convert to DOC Instantly
Fast, instant DOCX to DOC conversion. No signup required. Just drop your .docx file and get .doc in seconds.
Batch Settings
Some metadata may not survive
Your DOCX file may contain Office XML properties, Dublin Core metadata. DOC has limited or no support for these metadata types. Location data (GPS), camera settings, and color profiles may be stripped during conversion.
Quem trabalha com documentos no dia a dia sabe que nem sempre o formato mais recente é o mais aceito. O DOCX virou padrão em computadores modernos, mas muitos sistemas — especialmente em repartições públicas, cartórios e plataformas bancárias mais antigas — ainda exigem o DOC. Converter um arquivo parece simples, mas perder formatação, quebrar tabelas ou embaralhar fontes é mais comum do que deveria ser. Aqui você faz essa conversão de forma direta, sem precisar instalar nada nem criar conta. O arquivo sai do outro lado com a estrutura preservada, pronto para ser enviado, assinado ou arquivado sem dor de cabeça.
- Envio de contratos para sistemas de bancos digitais como Nubank e Itaú que ainda processam DOC
- Submissão de documentos em portais governamentais portugueses como o ePortugal e o Portal das Finanças
- Entrega de materiais editoriais a editoras e agências que mantêm fluxos de revisão em DOC
No Brasil, a Receita Federal e alguns tribunais estaduais ainda utilizam sistemas legados que rejeitam DOCX automaticamente. Em Portugal, formulários do IRN e da Segurança Social frequentemente circulam em DOC por compatibilidade com versões antigas do Microsoft Office instaladas em organismos públicos.
About DOCX to DOC Conversion
Dealing with a DOCX file that won't open on your device? You're not alone — DOCX compatibility issues are one of the most common reasons people search for a file converter. DOCX is Microsoft Word's modern format based on Office Open XML — editable text documents with formatting.
The fix is simple: convert your DOCX to DOC. DOC is the legacy Microsoft Word format (pre-2007) — still widely circulated. This conversion lets you convert between formats quickly, solving the problem in seconds rather than hours of troubleshooting.
Full Name: DOCX uses Microsoft Word Document, while DOC uses Microsoft Word Legacy. Compression: DOCX uses Lossless, while DOC uses None (uncompressed). Typical File Size: DOCX uses 50 KB–10 MB, while DOC uses 50 KB–10 MB. Converting DOCX to DOC maintains high quality with CocoConvert's optimised encoder settings.
CocoConvert processes your DOCX file on secure servers in Germany — upload, convert, download. Your files are encrypted via TLS and automatically deleted within 24 hours. No account needed, no software to install, and it works on any device with a browser.
This conversion is ideal when you You need maximum device and software compatibility. Common misconception: ""DOC will be smaller than my DOCX file"" — in reality, doc uses no compression, so the output file is often larger than a lossy docx. if you need a small file, doc may not be the right choice.
The conversion engine behind CocoConvert uses FFmpeg, Sharp, and qpdf — the same open-source libraries trusted by Netflix, YouTube, and enterprise platforms. Pro users can batch convert up to 100 files at once.
How to Convert DOCX to DOC
- 1
Add your DOCX file
Drag and drop your .docx file into the converter, or tap "Browse" to pick it from your device. Multiple files are supported for batch processing.
- 2
Pick DOC output
Select .doc as the target format. CocoConvert automatically applies the best quality settings for this conversion.
- 3
Start conversion
Hit the Convert button. The document engine processes your file server-side — no CPU drain on your device.
- 4
Save your file
Once done, download your .doc file. For batch jobs, download all at once as a zip.
What Happens When You Convert DOCX to DOC
Your DOCX file is decoded and re-encoded as DOC.
Your DOCX file is uploaded and the format is validated
The file content is decoded into its raw representation
The data is re-encoded in DOC format with optimal settings
The converted file is ready for download
DOCX vs DOC — Detailed Comparison
| Feature | .DOCX | .DOC |
|---|---|---|
| Full Name | Microsoft Word Document | Microsoft Word Legacy |
| Compression | Lossless | None (uncompressed) |
| Typical File Size | 50 KB–10 MB | 50 KB–10 MB |
| Platform Support | Universal | Universal |
| Browser Support | none | none |
| Year Created | 2006 | 1983 |
| Open Standard | Yes | No |
Should You Convert DOCX to DOC?
When to Convert
- ✓You need maximum device and software compatibility
Common Mistakes When Converting DOCX to DOC
"DOC will be smaller than my DOCX file"
DOC uses no compression, so the output file is often larger than a lossy DOCX. If you need a small file, DOC may not be the right choice.
Frequently Asked Questions
Why won't my DOCX file open?
DOCX files may not open if your device lacks the right codec or application. Converting to DOC — a more widely supported format — usually resolves this. DOC is the legacy Microsoft Word format (pre-2007) — still widely circulated.
Is it safe to convert DOCX to DOC online?
Yes. CocoConvert encrypts your file via TLS, processes it on isolated servers in Germany, and permanently deletes it within 24 hours. Your files are never shared or analysed.
Will I lose quality converting DOCX to DOC?
Converting DOCX to DOC maintains high quality with CocoConvert's optimised encoder settings. CocoConvert uses high-quality encoder defaults to preserve as much fidelity as possible.
How large can my DOCX file be?
Free users can convert files up to 250 MB each. Pro users get a 5 GB limit per file, and Business API users have custom limits.
Can I convert DOCX to DOC on my phone?
Absolutely. CocoConvert works in any modern browser — iOS Safari, Android Chrome, and all desktop browsers. No app required.
Versions are pinned in our worker Dockerfile and re-built via CI on every change.