I built JustOpenFile, a browser-based file viewer that processes files locally without uploading them to a server.

  It supports PDF, DOCX, Excel, CSV, JSON, Markdown, EPUB, ZIP, SQLite, images,
  audio, video, fonts, and 3D formats such as STL, GLB, and OBJ. ZIP archives
  can also preview supported files inside them.

  The project was motivated by a simple problem: opening an unfamiliar file
  often requires installing an application or uploading potentially sensitive
  data to an online service.

  There is no account, installation, or upload required.

  https://justopenfile.com

  I’d appreciate feedback on file formats you would find useful and any
  compatibility or performance issues you encounter.

Comments URL: https://news.ycombinator.com/item?id=48488469

Points: 2

# Comments: 0

  No signup, all scores stored locally, takes 1-2 mins per test. 
  Useful for anyone into competitive FPS/MOBA games or just curious about their cognitive performance. Feedback welcome!

Comments URL: https://news.ycombinator.com/item?id=46256650

Points: 1

# Comments: 0

While GitHub Trending often shows the same established repositories cycling through, my Newcomer Ranking specifically focuses on repositories that are both new AND gaining significant traction recently.

Comments URL: https://news.ycombinator.com/item?id=45632724

Points: 18

# Comments: 21

Comments URL: https://news.ycombinator.com/item?id=45541068

Points: 4

# Comments: 2

  Instead of generic brainstorming, it:
  1. Extracts key data from proven businesses (audience, model,
  positioning)
  2. Uses AI to generate adjacent opportunities
  3. Provides similarity control (copycat to completely different)
  4. Supports multiple languages and target markets

  Database includes 7,000+ successful sites across 40+ categories.

  Built this because most startup ideas fail due to lack of market
  validation, not lack of creativity. Better to start with proven demand
  and find new angles.

Comments URL: https://news.ycombinator.com/item?id=44573057

Points: 1

# Comments: 0

  Key features:
  • Real-time alerts from global news sources
  • Custom keyword tracking 
  • Smart filtering to prioritize important news
  • Perfect for investors, traders, and business professionals

Comments URL: https://news.ycombinator.com/item?id=44477417

Points: 20

# Comments: 13

  Just type what you need: "email icon", "settings gear", "user profile",
  etc. The AI creates clean, professional vector graphics that you can
  download immediately.

  Why SVG?
  - Scales perfectly at any size
  - Tiny file sizes
  - Easy to customize colors/styles
  - Works everywhere (web, print, apps)

  Built this because I was constantly buying icon packs or spending hours
  searching for "that one perfect icon." Now I just generate exactly what I
   need in seconds.

  The tool is free (5 daily generations) with optional credits for
  private/commercial use. All public icons are searchable in the community
  gallery.

  Try it out and let me know what you think!

Comments URL: https://news.ycombinator.com/item?id=44385260

Points: 1

# Comments: 0

The concept is simple: you enter your name, get an anonymous link to send to your crush. They see a message saying someone likes them and need to guess who. If they guess your name correctly, you both get notified of the match. If they guess wrong, they never know it was you.

Tech stack: Flask + SQLite, with Google OAuth for notifications. The tricky part was designing the UX to feel safe and non-creepy while maintaining complete anonymity until there's mutual interest.

Some interesting challenges I solved: - Preventing spam/abuse while keeping it anonymous - Designing the guess mechanism to avoid awkwardness - Making sure failed guesses truly stay private

It's completely free and I'm not collecting any personal data beyond what's needed for the matching. Would love feedback from the community on the concept and execution!

Live at: https://secretcrush.im/

Comments URL: https://news.ycombinator.com/item?id=44299934

Points: 1

# Comments: 2