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Drop two versions of a contract or drawing set. Moved notes read as moves, changed values light up digit by digit, and hidden text is named.
LaunchSide-by-side or overlay PDF diff driven by one engine that reads each file into a structured model — text, vector geometry, images, form fields, annotations — and compares the models. Moves show as moves, edits show only where they happened, and any PDF type works without picking a mode.
Drop a Gerber ZIP, an ODB++ .tgz or an IPC-2581 .xml and inspect every layer — compare revisions, snap-to-pad measure, run DRC and preview the board in 3D.
LaunchOpen Gerber, Excellon, ODB++ and IPC-2581 PCB files. Inspect layers, measure traces, run DRC, export to PNG / SVG / DXF.
Open a .step / .stp part and it measures itself: volume, thinnest wall, draft and undercuts on load, and a hole list with a BOM in one click. Measure, section, export STL.
LaunchOpen a STEP / STP part and it measures itself — volume, thinnest wall, draft and undercut checks on load, plus hole detection with a BOM. Measure, section, export STL. Rust + WASM B-rep kernel, runs in your browser.
Compress, merge, split, convert, and manipulate PDF files.
Resize, compress, convert, and transform images.
Convert, compress, and cut audio and video — MP3, WAV, MP4, WebM, Opus — all in your browser, nothing uploads.
Simulate a canning process down to its F0 sterilizing value.
Encrypt files, share encrypted notes as links, and read passport IDs and Windows event logs.
Analyze packet captures, move files between devices, and console into network gear — nothing uploads.
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Starters and koji from China
Tou-huang is a medicinal ferment from the Chinese materia medica. A dou of black soybeans is steamed, spread on mats under artemisia as for the yellow stage of jiang, left until a yellow coat forms, then sun-dried and pounded to powder. This entry is a text-only reconstruction from two written sources.
| Black soybeans1 dou ("a peck" in Stuart's translation) | Steamed until fully cooked[bencao-ws][stuart1911] |
| Artemisia stalks | Spread over the beans[bencao-ws][stuart1911] |
What changes: Black soybeans are steamed until fully cooked
Output: fully cooked black beans.
Microbes at work in this step
Not documented for this step.
Measured measured in a studySet fixed by a specification or tested recipeReported one source reports itTypical a general value, not sourced for this fermentUnconfirmed not yet checked against a source
Tou-huang is a medicinal ferment from the Chinese materia medica. A dou of black soybeans is steamed, spread on mats under artemisia as for the yellow stage of jiang, left until a yellow coat forms, then sun-dried and pounded to powder. This entry is a text-only reconstruction from two written sources. Various moulds and mildews in the coat; Stuart notes it is probably not uniform does most of the fermenting.
Tou-huang is covered and moulded the way beans are for jiang, but it stops at the yellow coat and is dried and powdered as a medicine instead of being salted into a sauce.
Do not make or take this at home. The Bencao Gangmu lists tou-huang as sweet, warm and non-toxic, but that is a judgement from 1578, not a safety test. It also records advice, attributed there to Shen, to avoid pork with it and that stout people should not take it. Neither source gives a drying time or a safe limit. The yellow coat is wild mould, and no source we read tested it for toxins. As general guidance, Owolabi et al. (2022) note that a fermented food can still carry mycotoxins when its raw material is contaminated, and that some fermentation conditions favour growth of toxigenic Aspergillus, Fusarium and Penicillium.
Every number is labelled with how it is known. How this atlas is made
Li Shizhen's Bencao Gangmu (1578) cites the entry to the Shiliao (食療) and moves it out from under the soybean. Stuart's Chinese Materia Medica (1911) translates the method and calls the product a fermentation pellicle.
