How can I generate Arabic RTL and Russian Cyrillic PDFs in Cloudflare Workers or Node.js with zero dependencies?

msfPDF compiles Latin, Russian/Ukrainian Cyrillic, and connected Arabic/Persian/Urdu RTL text directly into 7-bit ASCII %PDF-1.4 streams using dynamic Type 3 vector glyph subsets (2048 UPM) and normalized UTF-16BE /ToUnicode CMaps, requiring zero external .ttf font files, zero WASM binaries, and zero npm runtime dependencies.

Why is msfPDF immune to SSRF and LFI vulnerabilities common in HTML-to-PDF tools?

Unlike Headless Chromium, Puppeteer, Playwright, or wkhtmltopdf, msfPDF never parses HTML, CSS, SVG, or URLs and opens zero network sockets. It compiles strongly typed JSON DocumentSpec ASTs directly into PDF vector operators with strict byte, page, block, and row limits.

Do the Rust crate and TypeScript package produce identical PDF files?

Yes. Both msfpdf-core (Rust) and msfpdf (TypeScript) share the exact same layout coordinates, AFM + 2048 UPM glyph tables, Arabic BiDi shaper, Reed-Solomon GF(256) QR encoder, and ASCII xref writer, producing byte-for-byte SHA-256 identical PDF outputs.

msfPDF · Sub-Millisecond Zero-Dependency %PDF-1.4 Engine (Rust & TypeScript)

Compile PDFs live

Edit English, Russian, or Arabic fields below. The zero-dependency TypeScript engine compiles a real binary-clean %PDF-1.4 file right inside this tab.

Palette preset

Minor-unit currency

Header title (Latin, Кириллица, or العربية)

Counterparty line

Connected Arabic RTL or compliance note

ISO 18004 QR verification payload

0.65 ms Browser compile

143,533 B Exact stream size

52 Type 3 Dynamic subset

7-bit PASS xref integrity

Live specimen preview & vector QR matrix

فاتورة ضريبية معتمدة · لا توجد رسوم إضافية على التسوية رقم 8841

$19,425.00

xref
0 8
0000000000 65535 f 
trailer
<< /Size 8 /Root 1 0 R >>
startxref
%%EOF

Scripts and blocks

Select any row to inspect how msfPDF emits typography, cryptography, and vector geometry without external fonts.

Latency at scale

Measured on Linux x86_64 compiling a 2-page A4 invoice with vector QR code and itemized tax rows.

0.52 ms

Median Rust compile time. Up to 1,896 documents per second on one CPU core.

0.52 ms msfPDF Rust

0.84 ms msfPDF TS

14 ms jsPDF

22 ms PDFKit

26 ms Typst Warm

45 ms ReportLab

280 ms WeasyPrint

490 ms Chrome Warm

950 ms wkhtmltopdf

1,850 ms Chrome Cold

Architectural comparison across server and edge PDF stacks
Engine	P50 latency	Cold RAM	Runtime deps	Arabic + Cyrillic	SSRF surface
msfPDF (Rust)	0.52 ms	~2.4 MB	0 crates (810 KB CLI)	Built-in Type 3 (0 .ttf)	Zero (no HTML/net)
msfPDF (TypeScript)	0.84 ms	~8 MB V8	0 npm packages	Built-in Type 3 (0 .ttf)	Zero (no HTML/net)
Typst CLI	18–45 ms	~35–60 MB	External font pack	Requires .ttf/.otf files	Low (local FS sandbox)
WeasyPrint	180–420 ms	~95–160 MB	Cairo + Pango + HarfBuzz	System OS fonts	URL fetcher must be locked
Headless Chromium	380–2,400 ms	~280–550 MB	400 MB browser image	System OS fonts	High (DOM, SVG, network)

Four byte stages

Proportional share of a 520-microsecond document compile from raw JSON to sealed bytes.

70 microseconds

First, enforce byte, page, and row bounds before layout starts.

135 microseconds

Second, join Arabic ligatures and reorder visual UAX #9 runs.

195 microseconds

Third, emit vector primitives, QR paths, and used Type 3 glyphs.

120 microseconds

Fourth, write exact 10-digit ASCII xref offsets and seal EOF.

Inside the stream

Macro views of the primitives paired with genuine Poppler rasterizations of msfPDF outputs.

لا · فاتورة

Connected Arabic RTL

20-FUnit stem overlaps in 2048 UPM eliminate seams between joined Arabic letters.

Счёт № ₽

Cyrillic + Ruble

Full U+0401..U+045F alphabet, Ukrainian І/Ї/Є/Ґ, Ruble sign, and Numero glyph.

SHA-256

Dual-runtime parity

Rust CLI and TypeScript SDK emit the exact same byte sequence for every input spec.

Rendered UK Fintech VAT invoice in GBP with Bento summary cards and itemized lines — UK Fintech VAT 14.0 KB

Rendered multi-page compliance agreement with automatic continuation headers and signature grid — Multi-page contract Auto break

Stepped modern architectural corner illustrating structured agent schemas — AI & LLM ready llms.txt + Schema

Engine questions

Direct technical answers for engineers, security reviewers, and coding agents evaluating msfPDF.

How does msfPDF render Arabic and Cyrillic without .ttf files?

msfPDF ships 273 Public Domain cubic Bezier glyph outlines in integer 2048-UPM coordinates. When a document contains Cyrillic or shaped Arabic codepoints, the compiler subsets only the used glyphs into a PDF /Type3 font dictionary and attaches a UTF-16BE /ToUnicode CMap.

Does pure Latin output pay any size overhead for multilingual support?

Zero bytes. Documents that only use ASCII and Western European CP1252 characters continue to use built-in PDF Standard 14 /WinAnsiEncoding, keeping a rich A4 invoice with vector QR code at roughly 14 KB.

Can it run inside Cloudflare Workers, Vercel Edge, or browsers?

Yes. The core TypeScript entry point imports zero Node.js built-ins, zero native addons, and zero WASM modules. The live compiler studio on this page runs the exact same module directly in your browser.

Why is 7-bit ASCII purity enforced across the entire PDF stream?

Multi-byte UTF-8 sequences inside raw PDF streams often corrupt byte-offset calculations in xref tables when strings are manipulated in JavaScript or proxies. Emitting strictly 0x0A and 0x20..=0x7E guarantees character length equals byte length everywhere.

How can AI coding agents integrate msfPDF automatically?

Feed llms.txt or llms-full.txt to your model, validate LLM structured outputs against document-spec.schema.json, or drop the bundled skills/msfpdf/SKILL.md into Claude Code, Cursor, Codex, or Antigravity.

When should I still choose Typst or Headless Chromium instead?

Choose Headless Chromium when you must screenshot arbitrary user-authored CSS/DOM dashboards, and choose Typst for academic typesetting with LaTeX math formulas or CJK OpenType fonts. Choose msfPDF for transactional invoices, receipts, statements, audit certificates, and multi-page contracts.

Vector PDFs in microseconds.