FileLumo limits & usage
FileLumo is built to stay free: no signup wall, no watermark upsell, and honest limits published here. This page explains what to expect per tool, how Talk to PDF throttling works, and when practical device or network limits apply.
Global policies
- 100% free — no subscription, no paid tier, and no watermark on downloads.
- No fixed daily or monthly conversion cap across core tools (subject to fair-use and abuse protection).
- No registration required for standard tools.
- Server-side file copies are deleted after about 1 hour.
- We do not sell your documents or use uploads to train public AI models.
Talk to PDF (AI) limits
The AI assistant is free but rate-limited so the service stays fast for everyone. In your browser, you can send about 10 messages per hour per device (rolling window). Uploads are capped at 100 MB per PDF or Word file. Server-side API calls also have short-term abuse protection. If you hit the cap, wait until the timer resets or try again later on a stable connection.
Per-tool limits
Batch counts reflect the FileLumo UI today. File-size rows describe documented or client-enforced caps; many tools have no fixed FileLumo megabyte limit, but very large files may still fail on slow networks or low-memory devices.
| Tool | Files per job | File size | Notes |
|---|---|---|---|
| PDF Merge | Up to 10 PDFs | No fixed FileLumo cap | Arrange order before merging |
| PDF Compress | 1 PDF per run (batch upload UI: up to 20 queued) | 50 MB per file (documented) | Server-side compression |
| PDF Split | 1 PDF | No fixed FileLumo cap | Extract pages or ranges |
| PDF Editor | 1 PDF | 40 MB (browser editor) | Runs mostly in your browser |
| Chat with PDF (AI) | 1 PDF or Word (.docx) per session | 100 MB | 10 AI messages per hour per browser (soft limit) |
| PDF to Word / Word to PDF | 1 file | No fixed FileLumo cap | See also /word-to-pdf |
| JPG to PDF | Up to 50 images | No fixed FileLumo cap | Combined into one PDF |
| Image Compress | Up to 20 images | No fixed FileLumo cap | JPG, PNG, WebP |
| PDF Sign | 1 PDF | No fixed FileLumo cap | Draw or upload signature |
| Workflow Builder | Up to 15 files per pipeline step | Depends on each tool in the pipeline | Saved locally in your browser |
When jobs fail (practical limits)
Even without a paywall, very large PDFs, long scans, or dozens of images can exhaust browser memory or hit network timeouts. If a job fails, try Wi‑Fi instead of mobile data, close heavy tabs, compress scans first, or split a PDF before merging. The FAQ covers common error messages.
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