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Air-gapped file encryption as self-decrypting HTML page

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Air-gapped file encryption packed into a single, self-decrypting HTML page. Repo: https://github.com/ApelegHQ/ts-cms-ep-sfxI was inspired by self-extracting archives. I wanted to share files with basically no dependencies. The goal was: 1. Something that didn't require any installation (assuming a web browser) 2. Have a single file with no network that could self-decrypt 3. Be fully auditable The second point is done by having (sort of(*)) reproducible builds and embedded OpenPGP signatures.The first point is made by cleverly manipulating the HTML structure so that it can decrypt without breaking the PGP signature. It can even decrypt using bare openssl (which was a design goal too, though getting the exact structure right took some work and bug reports).The third point is accomplished by the first two, and by the source being freely available.(*) Depends on the OS at the moment.

HN · launched Sep 24, 2026 · 90 upvotes (top 9%) · 2 views

Niche: encryption and cryptography tools · 147 launches, 21 in the last 7 days ▲ +40% · Explore this niche →

Category and tags
  • Horizontal
  • Dev tools
  • Prosumer
  • Not AI
  • Hobby / open-source project

Visit website ↗ Source listing ↗

More like this: all 147 launches in encryption and cryptography tools →

Could you build this?

Yes A standalone self-decrypting HTML document is easily created using standard browser Web Crypto APIs (like AES-GCM and PBKDF2) wrapped inside an exported HTML file template.

Discussion

5 comments analyzed.

Competitors

Other products that read as similar to this one : 200 launches clear the similarity bar, closest 8 shown.

Attention rank: #9 of 201 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).

Launched 329 days after the earliest competitor.

  • witness-vault · github · 2026-10-01 · 26 upvotes · similarity 0.61
  • Portable Secret · hn · 2026-02-26 · 5 upvotes · similarity 0.53
  • Classified · ph · 2026-09-10 · 1 upvotes · similarity 0.51
  • UniDoc Encryption · ph · 2026-09-29 · 1 upvotes · similarity 0.50
  • SecretGate · hn · 2026-10-06 · 7 upvotes · similarity 0.48
  • folder-lock · github · 2026-11-10 · 102 upvotes · similarity 0.48
  • scuttle · github · 2026-09-23 · 55 upvotes · similarity 0.45
  • CipherTEA · ph · 2026-11-10 · 2 upvotes · similarity 0.44

Related data

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