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 with a document-type selector — Document (contracts, reports), AEC / Blueprint (drawings, schematics), or Image-Scan. 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.
Drop a .step or .stp file and view the 3D model instantly — orbit, measure, screenshot. Real Rust + WASM B-rep kernel, no install, no upload.
LaunchOpen STEP / STP files in your browser. Real Rust + WASM tessellation kernel. Orbit, measure, screenshot. No upload.
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.
Convert, compress, and cut audio and video — MP3, WAV, MP4, WebM, Opus — all in your browser, nothing uploads.
Sourdough baker math, canning processing times — kitchen math you should not memorize.
AES-256 file encryption and self-destructing encrypted notes.
Analyze packet captures and run sysadmin diagnostics in your browser — nothing uploads. PCAP Analyzer ships first.
Chart-overlay technical analysis and precision financial math — your screenshots and numbers never leave your device.
Open CAD, BIM, medical, and enterprise files without paying $300-30K/year for the native software. Gerber Viewer ships first.
Drop a .step or .stp file and view the 3D model instantly — orbit, measure, screenshot. Real Rust + WASM B-rep kernel, no install, no upload.
Launch STEP Viewer
| Feature | Loft STEP Viewer | Autodesk Viewer | SOLIDWORKS eDrawings |
|---|---|---|---|
| Pricing | |||
| Cost to view | Free | Free* | Free |
| Anywhere | |||
| Works without installing | |||
| Works on any OS / mobile | |||
| Core viewing | |||
| Orbit / pan / zoom | |||
| Shaded / wireframe / edges | |||
| Point-to-point measure (mm) | |||
| PNG screenshot export | |||
| Privacy | |||
| Files never uploaded | |||
| Trade-offs · what we don't do | |||
| Edit / repair geometry | |||
| Full assembly tree / BOM | |||
We list trade-offs explicitly. Browser-based + privacy-first means some features that need a server (cloud sync, named-account workflows) won't ship here.
We compiled a Rust CAD kernel (forked from Formlabs Foxtrot, Apache/MIT) into WebAssembly. Your browser loads the kernel once, then parses STEP files locally. The file never leaves your device.
AP203 and AP214 are the strongest paths today. Many AP242 files also parse since AP242 is a superset of AP214. The Foxtrot kernel handles 26 entity types covering most mechanical-part geometry.
Most likely the file uses surface types our kernel doesn't yet handle (spun surfaces, offset surfaces, swept surfaces). The viewer surfaces a clear error message. We're widening entity coverage incrementally.
No. Loft Tools is an independent project. We vendor Formlabs Foxtrot's STEP parser under its Apache/MIT licence.
DXF is on the way. IGES and DWG aren't browser-native — convert upstream to STEP. ODB++ is a roadmap item.
Free forever · No sign-up · Files never leave your device.
