About InstantDocView
InstantDocView started from a simple idea: you should not have to install software or upload a file to a stranger's server just to read a document someone sent you.
What you can do
- Open documents: Hangul (HWP, HWPX), Word (DOCX), PowerPoint (PPTX), Excel (XLSX, XLS), CSV, PDF, plain text (TXT) and Markdown (MD). Open several files at once in tabs or side by side.
- Edit: Edit Hangul (HWP, HWPX) documents in the browser and save them as HWP or HWPX.
- Convert and extract: Extract text from HWP files and convert Excel or CSV sheets to JSON.
- Writing help: Count characters, spaces and bytes for applications and forms.
- Privacy: Automatically mask resident registration numbers, phone numbers, email addresses and card numbers.
How it works
Most online converters upload your file to their server and process it there. InstantDocView works the other way around: the page sends the document engine (JavaScript and WebAssembly) to your browser, and your browser does all the work. The documents you open are never sent over the network and are never stored on our servers. You can check this yourself in your browser's developer tools: open the Network tab, open a file, and you will see that no upload request is made.
Open-source software
This service is built on excellent open-source projects.
| Feature | Library | License |
|---|---|---|
| HWP and HWPX viewing and editing | rhwp (@rhwp/core, rhwp-studio) | MIT |
| DOCX rendering | docx-preview | Apache-2.0 |
| Excel and CSV parsing | SheetJS Community Edition | Apache-2.0 |
| PDF rendering | PDF.js (Mozilla) | Apache-2.0 |
| PPTX rendering | pptx-preview | ISC metadata and publisher's README terms |
| Typeface | Pretendard | SIL OFL 1.1 |
| Markdown | marked, DOMPurify | MIT, Apache-2.0 or MPL-2.0 |
| Icons | Lucide | ISC |
The full list and license texts are on the open-source licenses page.
This product was developed with reference to the HWP file format documentation published by Hancom Inc. "Hangul", "Hancom", "HWP" and "HWPX" are registered trademarks of Hancom Inc. Microsoft Word, Excel and PowerPoint are trademarks of Microsoft Corporation. This service is not affiliated with, sponsored by or endorsed by these companies.
Principles
- No uploads: We will not add server uploads to any document feature.
- No accounts: Every feature works without signing in.
- Free: The service is supported by advertising, shown only in places clearly separated from the file-opening controls.
- Useful content: Our guides are written to help with real document work.
Contact
For bug reports, feature ideas or partnership inquiries, please use the contact page.