StampThat

What it does

👉 StampThat automatically watermarks your documents the moment you upload them — anywhere on the web: email, Google Drive, WhatsApp Web, administration portals, bank forms,.. 🪪 A watermarked document cannot be reused by scammers to take out loans or commit fraud. 🛡️ All processing happens locally in your browser. Your files never leave your computer.

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  Browserprint2017 · browserprint.info · ▲137

  Are you uniquely identifiable?

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  SaferlayerSep 2026 · saferlayer.com · ▲27

  Protect ID scans with watermarks AI can’t erase easily

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  textmark2017 · ▲140

  Protect your content with an invisible, trackable watermark.

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  Proofmarked2023 · chromewebstore.google.com · ▲154

  Cybersecurity for everyone. Just in time for Black Friday!

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  Watermark.ink2018 · watermark.ink · ▲112

  Easy way to watermark photos online

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  DropTidyJan 2026 · droptidy.com · ▲121

  Remove sensitive photo data, 100% client-side & zero uploads

• 
  SimCity, but with Permits▲911

  A free city-building game in your browser. You are the mayor. You know what the city needs. Now get it past the zoning board, the neighbors, the appeals court and the next election.

  Life & fun · 2d ago · permit.petercai.com

• IV
  I've been paying for a rural Tanzanian's education for 10 years▲778

  Life & fun · 14d ago · tanzaniaeducationproject.org

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  Bigwords.page – Turn any screen into a sign. The URL is the app▲728

  Turn a phone, tablet or TV into a sign. Type a message and it fills the screen: welcome signs, timers, Wi-Fi passwords and more. No app, no account, free.

  Life & fun · 15d ago · bigwords.page

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  Guitoro, a virtual guitar you strum with your keyboard▲573

  Play a free virtual guitar online with your keyboard or by touch. Slow songs down and see every chord, string and strum. Acoustic, classic, electric and bass.

  Life & fun · 9d ago · guitoro.com

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  See *almost* any carriers phone settings▲432

  Carrier settings from iPhone, Pixel and Galaxy firmware, decoded and compared: APNs, VoLTE, 5G and Wi-Fi Calling per carrier, and what each build changed.

  Life & fun · 13d ago · carrierexplode.com

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  The whole Solar System and every tracked satellite, live in the browser▲407

  Life & fun · 23d ago · space.bl2.net

• IN
  isometric.nyc – giant isometric pixel art map of NYC▲1,325

  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

  AI · Jan 2026 · cannoneyed.com

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  Cowork▲1,088

  Turn Claude into your digital coworker

  AI · Jan 2026 · claude.com

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  DataFast▲867

  Revenue-first analytics

  Growth · Jan 2026 · datafa.st

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  OpenClaw▲836

  The AI that actually does things

  AI · Jan 2026 · openclaw.ai

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  Kilo Code Reviewer▲799

  Automatic AI-powered code reviews the moment you open a PR

  Dev tools · Jan 2026 · kilo.ai

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  PostSyncer▲793

  AI Content Maker, for Social Media Publishing

  AI · Jan 2026 · postsyncer.com