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Open Clarity Card
ZEROINSIGHT / Tools

Two cards for the information in front of you.

Choose a card and start writing. No account is needed and your input is not uploaded. Turn on browser saving or export a file to keep a copy.

01 / Tools

Clarity Card

Separate records, interpretations, and unknowns. Finish with one thing you can check next.

Open tool

02 / Tools

Source Check

Trace a statement back to its source. Record its date, scope, limitations, and what still needs verification.

Open tool

Your input stays in the page unless you explicitly choose browser storage or export a file. The tool does not verify sources automatically.

Search the site

Search is local to this language. Press Esc to close.

ZEROINSIGHT / Appearance & privacy

Your reading preference

Choose a theme

Automatic respects a dark system setting first, then uses device time for light, paper or dark. A manual choice always takes priority.

Remember the theme

The zi_theme cookie holds only the theme mode, consent version and expiry. It is sent with same-host requests, not used for analytics or advertising.

Without saving, your choice applies to this page only. We store no refusal record and do not prompt on each page. Choose “Remember the theme” when you need it.

Use daylight at your location

With separate permission, read location once and round it to about 1°. Daylight is calculated in this page’s memory; coordinates are neither saved nor sent to this site. Your browser may use its own location service.

Location is currently disabled. Automatic appearance still uses device time and system preference.

Location has not been read. This option is separate from remembering a theme.

Saving tool cards uses a separate checkbox in each tool. Agreeing to a theme cookie does not enable it.

Site & privacy