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Show HN: PostFast – AI-Powered Copywriting Browser Extension

1•WayneFung1992•2h ago
We built PostFast to simplify how creators and marketers generate platform‑specific copy. Instead of manually adapting the same product info for Twitter, LinkedIn, or a newsletter, you configure your product once, and PostFast uses AI to generate tailored content.

Key features: - One‑time setup for your product or service - Generates copy adapted to different platforms (style, tone, length) - Includes copy scoring and A/B variant comparison - AI-powered recommendations for which version to use - All inside your browser; no external app needed

It's built for indie makers, content teams, and marketers who need quick, consistent copy without jumping between tools. We focused on making it flexible and non‑opinionated—you control the inputs; the extension handles the formatting and platform nuances.

We're launching soon and opening a waitlist. If you regularly write promotional copy, we'd love your feedback on: - Which platforms you post to most - What kind of scoring criteria would be useful - Whether you'd prefer a free tier with limited generations

Waitlist and brief demo: [https://postfast.today/#subscribe]

(I’m one of the developers.)

How Elon Musk ruined Twitter

https://jacobin.com/2025/10/enshittification-doctorow-musk-twitter-internet
1•pramodbiligiri•1m ago•0 comments

AI stocks could be part of a new Magnificent 7

https://www.axios.com/2025/10/28/ai-oracle-palantir-nvidia-stock-market
1•doener•1m ago•0 comments

Beyond the Magic: How LLMs Work

https://www.tag1.com/white-paper/how-llms-actually-work/
1•goosers•3m ago•0 comments

Situated Software – Clay Shirky (2004)

http://shirky.com/essays/situated-software/
1•Quizzical4230•4m ago•0 comments

Stackful Coroutine Made Fast

https://photonlibos.github.io/blog/stackful-coroutine-made-fast
2•todsacerdoti•9m ago•0 comments

Why I no longer engage with Nature publishing group

https://hxstem.substack.com/p/why-i-no-longer-engage-with-nature
1•utkarsh858•10m ago•0 comments

The Majority of Your Users

https://jacobtomlinson.dev/posts/2025/the-majority-of-your-users/
1•sebg•11m ago•0 comments

Apple Has Two Problems

https://troz.net/post/2025/apple-has-two-problems/
3•frizlab•11m ago•0 comments

Recommend your best web designer

https://www.justskim.ai/
1•justindavid•15m ago•1 comments

The Highs and Lows of Tardigrade Pregnancy [video]

https://www.youtube.com/watch?v=a2HfXTZS7-w
1•latexr•16m ago•0 comments

A way to link to a router for Chinese Postman routing?

https://community.openstreetmap.org/t/routing-a-way-to-link-to-a-router-for-chinese-postman-routi...
1•altilunium•18m ago•0 comments

AI predicts Bitcoin price with Mt. Gox repayments delayed until 2026

https://finbold.com/ai-predicts-bitcoin-price-with-mt-gox-repayments-delayed-until-2026/
1•salkahfi•20m ago•1 comments

Austria: Pylons as sculpture for public acceptance of expanding electrification

https://www.goodgoodgood.co/articles/austrian-power-giants-power-line-animals
2•Geekette•27m ago•0 comments

Wi-Fi Energy Meter

https://www.iammeter.com/products
1•DeviceBit•29m ago•0 comments

GitHub Copilot Customizations

https://github.com/github/awesome-copilot
1•vismit2000•33m ago•0 comments

Monitor the Performance of Your Ecto for Elixir App with AppSignal

https://blog.appsignal.com/2025/10/28/monitor-the-performance-of-your-ecto-for-elixir-app-with-ap...
1•amalinovic•35m ago•0 comments

Some Heroes Wear Wigs

https://squirrelsquadron.substack.com/p/the-clark-test-the-ipt-newsletter
1•squirrel•36m ago•0 comments

Data, their rules: The growing risks of hosting EU data in the US cloud

https://blog.42futures.com/p/your-data-their-rules
2•birdculture•40m ago•0 comments

Libcpu: A library to emulate several CPU architectures using LLVM

https://github.com/libcpu/libcpu
1•fanf2•42m ago•0 comments

AI Trading in Real Market

https://nof1.ai/
1•rzk•43m ago•0 comments

Hogeweyk: Amsterdam's Revolutionary Dementia Village

https://faroutmagazine.co.uk/hogeweyk-inside-amsterdam-revolutionary-dementia-village/
1•Geekette•47m ago•0 comments

Python Foundation goes ride or DEI, rejects government grant with strings

https://www.theregister.com/2025/10/27/python_foundation_abandons_15m_nsf/
2•pseudolus•47m ago•0 comments

Amazon Says It Will Cut 14,000 Corporate Roles to Remove Layers

https://www.aboutamazon.com/news/company-news/amazon-workforce-reduction
12•jmsflknr•51m ago•1 comments

Show HN: I was tired of people dmming me just "hi", so I made this - NoGreeting

https://nogreeting.kuber.studio
3•kuberwastaken•54m ago•0 comments

Good Managers Write Good

https://staysaasy.com/management/2022/07/10/Writing-Management.html
2•thisismytest•54m ago•0 comments

Multi Layered Calendars (2023)

https://julian.digital/2023/07/06/multi-layered-calendars/
1•diatone•57m ago•0 comments

Who vs. Whom Lesson

https://www.youtube.com/watch?v=6HPb-0ce7Fw
1•modinfo•58m ago•0 comments

An AI Adoption Riddle

https://www.technologyreview.com/2025/10/28/1126687/an-ai-adoption-riddle/
1•fleahunter•1h ago•0 comments

When the Cloud Breaks: Lessons from the AWS Outage

https://www.akamai.com/blog/security/2025/oct/when-cloud-breaks-lessons-aws-outage
2•HieronymusBosch•1h ago•0 comments

Sufficiently Smart Compiler

https://wiki.c2.com/?SufficientlySmartCompiler
1•coffeeaddict1•1h ago•0 comments