True redaction removes the text and images from the file — not a black box on top. Plus real in-place text editing, fill + sign, reorder pages, and OCR.
LaunchEdit text in place, sign, redact, fill forms, and reorganize PDF files in your browser — all on your device. No upload, no subscription.
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.
Scan receipts into an expense ledger — your receipts and spending stay on your device.
View, measure, and repair CAD and 3D files — STEP, STL, OBJ, PLY, GLB, 3MF, DXF, and Gerber — right in your browser. Nothing uploads.
Soy and legumes from Santai County
Tongchuan douchi is a Mucor-type black douchi from Santai in Sichuan. Black soybeans are grown with Mucor mould into koji, then steamed, washed free of mould, flavoured with five-spice, star anise and other herbs and spices, and stored for a long time in cellars. A 2026 study followed it through 6 to 36 months of fermentation and found the mature flavour around 18 months.
A short entry: the sources we found record only what is said here about Tongchuan douchi itself.
| Black soybeans | High quality black beans are the main ingredient[ICH-939T] |
| Five-spice, star anise, Chinese medicinal herbs and spices | [ICH-939T] |
| Starter | koji with Mucor mould (Mucor-type douchi) |
Total time across the recorded steps: 6 months – 3 years
What changes: A fine Mucor mould grows over the cooked black soybeans
The ICH page lists fermentation, steaming, mould-washing, flavouring and drying as the main steps; it gives no times or temperatures. Output: Mucor koji.
Microbes at work in this step
Mucor mould grows over the cooked beans
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
Tongchuan douchi is a Mucor-type black douchi from Santai in Sichuan. Black soybeans are grown with Mucor mould into koji, then steamed, washed free of mould, flavoured with five-spice, star anise and other herbs and spices, and stored for a long time in cellars. A 2026 study followed it through 6 to 36 months of fermentation and found the mature flavour around 18 months. Made in 4 steps over 6 months – 3 years. The longest step, store it a long time in the cellar, takes 6 months – 3 years (Li X 2026). Mucor does most of the fermenting.
| Main step | 6 months – 3 yearsReported[li2026] | Store it a long time in the cellar |
|---|
Douchi is made with three kinds of starter, Mucor, Aspergillus oryzae and bacteria, and the ICH page rates the Mucor type best. Tongchuan douchi is a Mucor type with a very long cellar storage, a year and a half for the mature flavour in one study.
Every number is labelled with how it is known. How this atlas is made
The Qiu family moved from Jiangxi to Tongchuan prefecture in 1670 and made douchi with Mucor koji; the prefect sent it as tribute in 1678. In the fifth generation, Qiu Zhengshun's sauce works made more than 200,000 jin a year. National intangible heritage item 939 (ICH-939T).
