Observed arrival · 2026-09-26
mdseal puts documents under seal
A browser-based tool converts Markdown or HTML into PDF, slides, or PowerPoint, with optional PAdES sealing and third-party timestamping.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- People preparing documents that need verifiable integrity
- Worth noticing
- The page warns that PDF permission settings are not enforceable; a password that restricts opening is a separate, harder lock.
Field notes
The editor includes a live preview, file import, theme choices, and support for right-to-left text. For PowerPoint output, the page specifies that level-two Markdown headings start new slides. Signing can use an uploaded PKCS#12 certificate or, according to the site, a server certificate; the interface also explains that a document password locks opening rather than merely restricting use.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
⊠LoginAccess appeared gated
✦PrettyNotable craft visible
◎NicheUnusually specific use
One card from the complete issue