Edit text in place, sign, redact, reorganize. True content-stream rewrite, not stamp-on-top.
LaunchEdit, sign, redact, and reorganize PDF files in your browser. The Adobe Acrobat alternative that runs on your device — no upload, no subscription.
Pixel-perfect PDF diff with word-level text view, metadata + form-field compare, ruler, and exclusion zones.
LaunchSide-by-side or overlay PDF diff. Highlights pixel-level differences plus a word-level text diff in a modal.
Open any PCB Gerber bundle in your browser. Gerber X2, Excellon, layer compare, snap-to-pad measure, snapshot URLs.
LaunchOpen RS-274X / X2 Gerber and Excellon files. Inspect layers, measure traces, export to PNG / SVG / DXF.
Compress, merge, split, convert, and manipulate PDF files.
Resize, compress, convert, and transform images.
Format, encode, decode, and validate code and data — safe for production secrets.
Transform, analyze, and format text with instant results as you type.
Edit, convert, and optimize audio and video files.
Sourdough baker math, altitude baking adjustments, canning processing times, and homebrew ABV.
AES-256 file encryption and self-destructing encrypted notes.
Open CAD, BIM, medical, and enterprise files without paying $300-30K/year for the native software. Gerber Viewer ships first.
Effective: May 10, 2026 · Updated: May 13, 2026 · Version 1.1
Loft Tools is a closed-source service. We are nonetheless built on the shoulders of a generous open-source community. This page lists the third-party open-source software, fonts, and icons that ship with the Service, together with their licences and copyright notices.
If a component is missing from this page, that is an oversight, not a denial of attribution — please email legal@lofttools.com and we will correct it.
The component list below is manually curated for the launch release and reflects the major dependencies the Service ships with as of the Effective date above. Going forward, we will publish a build-time-generated, exhaustive list (covering every transitive dependency) once our build pipeline supports it. Until then, if you need the full transitive dependency tree for due-diligence purposes, email legal@lofttools.com and we will send it.
| Component | Licence | Copyright |
|---|---|---|
| PDF.js | Apache License 2.0 | © Mozilla and contributors |
| pdf-lib | MIT | © Andrew Dillon and contributors |
| PDFium (WASM build) | BSD 3-Clause | © 2014 PDFium Authors / Google Inc. |
| @embedpdf/pdfium, @embedpdf/engines, @embedpdf/models | MIT | © 2024 CloudPDF, Ji Chang |
| PaddleOCR (model weights) | Apache License 2.0 | © PaddlePaddle authors |
| ONNX Runtime Web | MIT | © Microsoft Corporation and contributors |
| Tesseract.js | Apache License 2.0 | © Project Naptha and contributors |
| FFmpeg.wasm | MIT (JS shim) / LGPL-2.1+ (compiled binary) | © FFmpegWASM authors / FFmpeg developers |
| Component | Licence | Copyright |
|---|---|---|
| Astro | MIT | © The Astro Technology Company and contributors |
| React | MIT | © Meta Platforms, Inc. and affiliates |
| TypeScript | Apache License 2.0 | © Microsoft Corporation |
| Tailwind CSS | MIT | © Tailwind Labs, Inc. |
| Vite | MIT | © Yuxi (Evan) You and contributors |
| Component | Licence | Copyright |
|---|---|---|
| Phosphor Icons | MIT | © Phosphor Icons authors |
| Inter (font) | SIL Open Font License 1.1 | © The Inter Project Authors |
| Space Grotesk (font) | SIL Open Font License 1.1 | © Florian Karsten |
| JetBrains Mono (font) | SIL Open Font License 1.1 | © JetBrains s.r.o. |
| Noto Sans (font, PDF edit fallback) | SIL Open Font License 1.1 | © 2014–2021 Adobe / Google Inc. |
The Service is hosted on Cloudflare Pages, Cloudflare Workers, Cloudflare R2, and Cloudflare D1. These are services we use under Cloudflare’s terms; they are not bundled into the Service and do not require attribution here.
The full text of every licence above, together with the per-component copyright notices PDFium / NotoSans / @embedpdf require, is bundled in this build at:
/THIRD-PARTY-NOTICES.txt (plain-text file shipped with every release)Canonical online copies of the same licences:
If a component is licensed under terms not listed here, the binding text is the licence file shipped with that component’s source code.
Email legal@lofttools.com with:
We will respond promptly, correct this page, and ship the fix in the next deploy.
Material changes are reflected in the lastUpdated date in the frontmatter. A complete change history is available on request to legal@lofttools.com.