OBSCURA OS
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Every tool on this site runs in your browser tab. Nothing you open is uploaded, there is no account, and the tools are free. Everything else worth knowing is below.

What people come here to do9

I am about to send someone a fileCLEANROOM, SCRUB, DOCSCRUB and 8 more Someone sent me a file and I do not trust itX-RAY, MACROLENS, DISARM and 10 more I need to hide part of a documentSEAL, VEIL, SCREENSHIELD and 5 more I need to prove somethingPROOF, PROVENANCE, CHECKSUM and 6 more I am on a deadline somebody else setDIARY, DSAR, BREACH and 5 more I want to stop being followed aroundFINGERPRINT, COOKIEAUDIT, UNBEACON and 5 more I need a password, a key or a codeKEYS, PHRASE, SHADOWKEY and 7 more I am putting a bundle of documents togetherSTAPLE, BUNDLE, EXHIBIT and 7 more I need to make somethingDocs, Sheets, Slides and 12 more

Start here5

Where to start: say what you need to do Drop a file and see what will take it Guides Every tool on one page Settings

Guides15

Does a photo show where it was taken? What is hidden in a Word document Data still in a spreadsheet you deleted Can text under a PDF redaction be recovered? How to check a file has not been changed Is an email really from who it says? What the tracking on a link does What a website learns before you click Is it safe to upload a file to a free tool? A password you can actually remember Send a file without it sitting on a server What a QR code can hide Redacting for discovery Is it safe to paste this into an AI? How to open a HEIC file

What to charge5

What to charge Copywriting rates Design rates Illustration rates Cost per mile

What this is5

About Why OBSCURA OS What's new FAQ For teams

How it keeps its word4

Threat model Security Verify what this page loaded Privacy

Using it3

Using it on two machines Install it as an app Waitlist

Paying for it2

Chip in, the one way to pay Refunds

The legal pages2

Terms Acceptable use
What this is, and what it is not

Questions people ask

Is anything I open here uploaded?

No. Every tool reads your file in the page, works on it in memory, and hands the result back to your own disk. There is no account and no server of ours holding anything of yours. The site's own checks drive every tool with a real file on each release and watch the network while it runs.

Is it free?

Yes, at home and at work, with nothing held back. There is nothing to buy; if it earns its keep, chip in what you like on the chip in page.

Where do my files go?

Where you put them. The Workspace apps save into a folder you choose on this computer, as ordinary files, and the tools save whatever they make to your downloads or that folder. Settings is where the folder is chosen.

Does it work offline?

Yes, once a page has been opened once. The site installs itself in the browser and keeps every page and library it has seen, so the tools run with the internet off.

Something is wrong. Who do I tell?

[email protected], from any page. A tool that did the wrong thing with a file is the most useful thing to hear about.

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