Troubleshooting Browser-Based Converters

Common failures and fixes for local WASM document converters: cache resets, offline mode, and storage limits.

First visit: downloading the engine

The LibreOffice engine inside WASM is large. The first time you convert, the browser pulls .wasm and helper data over HTTPS, usually from this site's /wasm/ folder. If the primary copy fails, production can fall back to a CDN for those binary chunks - still not your document as an upload. Corporate proxies or strict filters sometimes block those files; the Network tab shows a 404 or blocked host fast. For a gentler explanation of slow first visits, read first-load tips for slow setups.

Memory, storage, private windows

• Huge DOCX or image PDFs can exhaust tab memory - close other tabs or split the job.
• Private browsing can shrink storage quotas - try a normal window if loading never finishes.
• Low disk space breaks downloads - free a few gigabytes and retry.

When the output looks wrong

That is usually a layout or font limitation, not a random crash. Cross-check formatting, fonts, and tables. If one file fails, delete half the content in a copy until you find the shape that triggers the bug.

Still stuck?

Note your browser version, OS, rough file size, and whether it fails during download or during conversion. Reach out via the contact page. Try the same file on Word to PDF and PDF to Word to see if only one direction breaks.