hashtagfile.com
Prove a file hasn’t been changed. Without uploading it.
What it does
HashtagFile helps you prove a file hasn’t been modified. Generate a tamper-evident verification certificate based on a unique SHA-256 hash, and share a public verification link so anyone can confirm the file is still the same (byte-for-byte) without creating an account. Built for people who need certainty, not cryptography jargon, designers, freelancers, legal teams, creators, and anyone sharing important files.
Does a similar job
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Hey HN! I wanted to share something I built over the last few weeks: isometric.nyc is a massive isometric pixel art map of NYC, built with nano banana and coding agents. I didn't write a single line of code. Of course no-code doesn't mean no-engineering. This project took a lot more manual labor than I'd hoped! I wrote a deep dive on the workflow and some thoughts about the future of AI coding and creativity: http://cannoneyed.com/projects/isometric-nyc
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