Local-first. Realtime. Deterministic. The document engine that renders, edits and replays entirely in the browser.
Local-first by design
No white-mask hacks
Every operation tracked
WebGL → WebGPU roadmap
45/45 tests passing
The website should sell the engine idea: local-first preview, deterministic render commands and backend-verified export.
The local runtime previews text style and move operations before authoritative save/export.
The core is moving toward real textless tile composition with PDFium WASM and provider fallbacks.
Operation replay, compaction and committed state make the preview feel recoverable instead of temporary.
Use the page to attract technical users, partners and early-access conversations.
Layer and node based rendering with deterministic dirty invalidation.
PDFium-powered source suppression instead of pure drawRect masking.
Local edits can survive refresh and compact into committed state.
Layer focus, spatial index, ownership and worker resolve path.
Canvas now, WebGL compositor next, WebGPU-ready structure.
A possible runtime layer for document SaaS, legal tools and e-signature products.
Preview locally. Commit authoritatively.
● Replayed ops 128
● Committed ops 94
● Pending ops 34
Do not hide the engineering status. Make it the credibility layer.
The debug layer is not just internal. It explains why the engine is real.
Text Layer
Source suppression
Replacement text
Final composite
provider: pdfium-wasm
cache: hit
owner: span_1_14
Make the unfinished parts visible. That is stronger than pretending this is a finished generic SaaS.
Show operation log, compacted ops, committed ops and replay source in a dedicated view.
Measure warm-cache PDFium textless rendering and optimize matching / encode path.
Move final composite toward GPU layer pipeline and texture cache.
Better text rendering path for speed, clarity and consistent previews.
Compare optimistic preview against final authoritative PDF export.
Embed low-latency PDF interaction into web products.
Contract editing, review and annotation workflows.
Faster flows with realtime visual feedback.
Document transformations with deterministic operations.
Potential SDK/runtime layer for custom tools.
Position it honestly as an early technology preview and collect serious interest from people who understand document runtimes.