Write it down. Prove it later.

nobackdate is a private notebook where every save is timestamped and hash-chained the moment you write it — so when someone claims an idea is theirs, you can show exactly when you already had it in mind.

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How it works

  1. Write a note — rich text, attach files if you need to.
  2. Every save creates a new, unchangeable version with a hash tied to everything that came before it.
  3. Later, open the note's history to show a timestamped, tamper-evident record — or compare any two versions like a diff.
  4. Share a note read-only or read/write with another user whenever you want a second set of eyes.