MEASURED
The numbers behind Filum.
Every number on this page has a source. No unverified quality claims. No marketing language. Where data is inferred from observable behavior, it says so explicitly.
| Metric | Filum | Context |
|---|---|---|
| Third-party requests per page | 2 | The industry average for tools in this category exceeds 20. |
| On-device processing | Yes — for most operations | Split, merge, rotate, sign, organize, watermark, crop, redact, page numbers, and more run entirely in your browser. Format conversion (Word, Excel, EPUB) uses a secure server. |
| PDF to image output quality | 300 DPI | Pixel-correct output at 300 DPI on standard A4 PDF. |
| Account required | Never | Every tool is available immediately, without registration or sign-up. |
| Number of tools | 28 | Tools span PDF editing, format conversion, and image processing. |
| Files stored permanently | 0 | On-device tools never reach a server. Server tools delete your file within 60 minutes — immediately on download, or after the 60-minute retention window. |
Methodology
- Third-party requests per page: Measured 2026-06-15 via browser network panel on the Filum homepage. The two requests are the Geist font and a single analytics endpoint (only loaded after explicit consent).
- On-device processing: VERIFIED: client-side tools make zero outgoing requests during operation, confirmed via network panel. Server tools delete your file within 60 minutes — on download or by expiry.
- PDF to image output quality: Measured 2026-06-13: pixel width ÷ page width in inches = 300.1 DPI on a standard A4 document. Lossless PNG and JPG outputs both verified.
- Account required: VERIFIED: end-to-end conversion tested on all 28 tools without authentication.
- Number of tools: Exact count from the live registry — updated automatically when a new tool ships. Each tool is verified on a real document before it appears here.
- Files stored permanently: VERIFIED: audit log entries (deletion_reason: user_download or expiry) confirm deletion for every completed job. On-device tools process data locally — the server has no visibility.
Claims marked INFERRED are derived from observable behavior, not from source code review. Claims marked VERIFIED were tested directly against production. All numbers represent a point-in-time measurement — the date is stated in each source note.
What this means in practice
On output quality — DPI, format fidelity — Filum is on par with the tools in this category. Where Filum differs is architecture: the operations most likely to involve sensitive documents (sign, redact, crop, organize, split, merge) run locally in your browser. There is nothing to upload and no deletion promise to trust, because nothing was ever sent.
Format conversion (Word, Excel, EPUB to PDF) uses a secure server — the same class of infrastructure the industry uses — but deletes your file within 60 minutes, immediately on download. The 2-request figure is real: Filum loads less third-party infrastructure than is standard in this category. Whether that matters depends on what you are converting.