Send Sleuth

What it does

Send Sleuth makes it easy to validate and verify emails. Just enter a list of emails and start the add-on to have them all verified. Our add-on uses many indicators to verify the validity of an email such as the server’s MX records, email syntax and more!

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  Email Verification Tool 1.02018 · ▲79

  An add-on for email verification directly on Google Sheets

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  Email Verification Tool2018 · workspace.google.com · ▲55

  A Google Sheets add-on for bulk email verification

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  ValidSheet2023 · victrays.com · ▲103

  Validate emails in bulk inside Google Sheet using API

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  Email Verification in Google Sheets v22020 · workspace.google.com · ▲246

  Verify up to 230K email addresses directly in Google Sheets

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  Proofy2016 · proofy.io · ▲181

  Quickly validate and verify your email lists.

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  Self host Email ValidationJan 2026 · ▲51

  Cleanmails - Unlimited email verification

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  WallHop – 12ft.io is gone, so I built a replacement▲287

  wallhop is a free paywall bypass. Paste any article link to read it without paywall popups, ads or clutter. No signup, no extension. A simple 12ft.io alternative.

  Growth · 12d ago · wallhop.io

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  Prefer▲201

  The execution layer for AEO

  Growth · 23d ago · tryprefer.com

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  MakerMap▲197

  A living map of makers and what they’re building

  Growth · 27d ago · makermap.lol

• IM
  I made a web game called Almost Pong▲1,135

  Hi HN! I made many small web games in the past with Unity or Phaser. But this time I wanted to make something completely on my own. So I coded a basic game framework in plain JavaScript, and used it to make Almost Pong. This was a really fun project that taught me a lot about JavaScript, and I plan to make more minimalist games with this framework. Interesting fact: Almost Pong doesn't load any assets, all sprites and sounds are generated with code. Happy to answer questions, and please let me know if you have any feedback on the game. Thanks!

  Dev tools · 2022 · lessmilk.com

• IM
  I'm writing a free book called Computer Networks from Scratch▲792

  Life & fun · 2022 · networksfromscratch.com

• HA
  HN Avatars in 357 bytes▲701

  Paste the following into the console of any HN page - for annotated avatars on all HN comments. (self contained code) for(u of document.querySelectorAll('.hnuser'))for(u.prepend(c=document.createElement('canvas')),x=c.getContext('2d'),c.width=18,c.height=14,s=u.innerText,r=1,i=28+s.length;i--;i>>29>X*X/3+Y/2&&x.fillRect(6+2*X,2*Y,2,2)&x.fillRect(6-2*X,2*Y,2,2):r+=s.charCodeAt(i-28,x.fillStyle='#'+(r>>8&0xFFFFFF).toString(16)))r^=r>>17,r^=r>2

  Dev tools · 2022

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  Tome Beta▲697

  The storytelling tool for work

  Work · 2022 · tome.app

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  Kairn▲694

  Regain control over your days

  Dev tools · 2022

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  A game that tests how well you know your local area▲654

  How well do you know your area? Test your knowledge by locating streets on a map.

  Work · 2022 · backofyourhand.com