---
title: "A Journal for Software Engineers"
description: "A single HTML file, Web Crypto, local storage, no network calls. A private journal whose privacy claims you can verify yourself."
canonical: "https://sealedjournal.com/j/journal-for-software-engineers"
updatedAt: "2026-08-11"
category: "By Audience"
---

# A journal you can audit.

_One file. View source. That's the pitch._

You evaluate software for a living, so evaluate this: The Sealed Journal is one HTML file. Open DevTools. Watch the network tab stay empty. Read the source — it ships readable, with published hashes — and confirm that encryption is Web Crypto AES-256-GCM with PBKDF2 key derivation, that storage is local, and that “we can't read your journal” is not a policy but a property of the system. Most privacy promises ask for trust. This one asks for a code review.

Engineers also happen to need journals. The design decision you're second-guessing, the interview loop, the burnout you're pattern-matching in yourself, the side project that's really about something else — none of it belongs in the company wiki, your public notes vault, or a startup's mood-tracking app.

And you of all people know why the file format matters: platforms die, companies pivot, formats rot. An HTML file with client-side crypto will open in anything that still renders the web, decades out. It's the most boring possible stack, chosen on purpose. Boring is what survives.

## Questions

### What's the actual stack?

One self-contained HTML file. Web Crypto API for AES-256-GCM, PBKDF2 at 600,000 iterations for key derivation, IndexedDB for encrypted local persistence, a service-worker-free offline story because there's simply no server. View source; it's all there.

### Why not open source?

The source ships readable in the file with published hashes — you can audit exactly what runs. The license is commercial; the transparency is total. We think that's an honest trade.

### Can I put it in a git repo or on a USB stick?

It's a file. It goes where files go — a git repo, a USB stick, a NAS. Your license covers three devices for daily use; entries live in each browser's storage, and encrypted exports travel with you.

## Price

The Sealed Journal is a one-time purchase of $24 (introductory price, rising to $29). No subscription, no account, lifetime updates, 30-day refund. Buy at https://sealedjournal.com/#pricing

## Elsewhere

- Hub: By Audience — https://sealedjournal.com/journals/audiences
- All journals — https://sealedjournal.com/journals
- HTML version of this page — https://sealedjournal.com/j/journal-for-software-engineers