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Hiddencontent

Detects concealed text in documents, such as white-on-white or blank-format cells, returning the hidden runs, a verdict, and a signed offline certificate.

SecurityAPISecurityFor developers
hiddencontent.ai ↗
At a glanceswept 2026-10-12

≈ 6visits/mo

Little sign of use · estimate, read 2026-10-12

For
teams screening uploaded documents for hidden text or prompt injections before a model reads them
Price
Pay per usepricing page, read 2026-10-13 ↗
Activity
Activity not read yet
Company
AeroSpark.ai, Inc. · Domain since 2026terms of service · domain registered
Runs as
API
AlternativesSet it up for my teamIs Hiddencontent yours? Claim the card →
What people do with itread off hiddencontent.ai on 2026-10-13
  • detect concealed text and prompt injections in uploaded documents
  • strip hidden content from documents before a model reads them
  • check a signed screening certificate offline without contacting the vendor
The companyeach fact with its source · read 2026-10-13
  • Domain since2026domain registered
Your datawhat they publish, each line with its page · read 2026-10-13

“Your documents are not sent to any third-party AI provider, and nothing here trains on them.”

privacy policy ↗

These are Hiddencontent's own statements, read from its pages. We did not audit them. A line that is missing was not found on the pages we read; it does not mean the practice is absent.

How a program reaches itfound, not claimed · read 2026-10-13
  • MCP serverai.hiddencontent/mcpverified in the MCP registry
  • Stateanswers, requires sign-inchecked 2026-10-13
  • Address to connectapi.hiddencontent.ai/v1/mcp
  • API docshiddencontent.ai/docsthe vendor's page ↗

MCP server details →

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.

Alternatives in Securityby use, among tools still maintained

Figure and bar: visits/mo, estimate · year: online since

All Security tools →

Questions this page answers
  • What is Hiddencontent?

    Detects concealed text in documents, such as white-on-white or blank-format cells, returning the hidden runs, a verdict, and a signed offline certificate. It is listed in the Atlas under Security and made by AeroSpark.ai, Inc.

  • Who is Hiddencontent for?

    teams screening uploaded documents for hidden text or prompt injections before a model reads them

  • How much does Hiddencontent cost?

    Hiddencontent charges per use, per its pricing page on 2026-10-13.

  • Do people use Hiddencontent?

    Little sign of use: ≈ 6 visits/mo · estimate, 2026-10.

  • Who owns Hiddencontent?

    Hiddencontent is run by AeroSpark.ai, Inc., per its terms of service (2026-10-13).

  • Does Hiddencontent train AI on your data?

    Its privacy policy speaks for its AI providers rather than for Hiddencontent itself (2026-10-13): “Your documents are not sent to any third-party AI provider, and nothing here trains on them.”

  • What are alternatives to Hiddencontent?

    In Security, by use: TruthScan, IsThisSpam, Lakera, PDFized, Secured AI, ZeroRisk Vendor Management.

Not quite it? Describe the job

beta

Five tools from the Atlas that fit it, each judged against what you wrote.

How we read a tool

No votes, no reviews, no vendor claims. Every week a crawler reads each tool's own site and a few public registries, and the words on the card are bands over what it read.

  • Use: visits to the site (estimated), installs from npm and PyPI, presence in Chrome's usage report.
  • Activity: the newest release on GitHub, npm or PyPI; the newest dated page on the site; open roles on a public jobs board.
  • Price: the vendor's own pricing page, read with the date. A figure is printed only when it is on that page.
  • The line and the use cases are written by us from the homepage, one tool at a time, and refused when they repeat the vendor's marketing.

How AI assistants read each site — the reading vendors ask us about — is on each tool's own visibility page.