
Screenfully - Mobile App Demo Creator
Create polished mobile app demos and mockups directly on your phone.
@startappdev · X
I'm working on a mockup and demo creation tool straight on your phone so you can build in public easily.
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Create polished mobile app demos and mockups directly on your phone.
@startappdev · X
I'm working on a mockup and demo creation tool straight on your phone so you can build in public easily.

Receive and manage form submissions via email with spam protection and webhooks.
danilovilhena · HN
AI-ready free form backend

200+ free browser-based tools for invoicing, rentals, online selling, and real estate—no signup needed.
u/Cryingpinaple · Reddit
Built a free toolkit that grew into 5 sites, 200+ tools, no signup required I started this a few days ago to build a free invoicing tool for freelancers because everything I found was gated behind a signup wall or a "free trial." It turned into a small portfolio of 5 sites, each aimed at a different kind of solo operator: Ledgerline: invoicing, contracts, and tax calculators for freelancers Rentline: rent increase letters, late fee calculators, and lease guides for landlords Sellerline:

Interactive demo for experimenting with grading mechanics.
@TheEduardoRFS · X
I vibe coded a demo for grading, not in a great shape but it's fun to play a bit.

Free tools to convert, compress, and edit files directly in your browser without uploads.
@faisalhaleem · X
Just launched — free browser-based file tools runs entirely in your browser. Video to GIF (with trim slider) Merge / Split / Shrink PDF Your files NEVER leave your device. No sign-up needed. Free forever. #buildinpublic #webdev #indiedev #tools #privacy

Free website SEO audit covering Core Web Vitals, mobile, and schema in 60 seconds.
@spiderwebagent · X
Check out what I just built with Lovable!

Design electronic circuits and PCBs in your browser with KiCad, no installation required.
ViktorEE · HN
KiCad, a PCB EDA suite is now working in a browser, you can try it at the link, there's a demo project or you can bring your own. Firefox is best, Chrome is good, Safari is "working". We’re Emergence Engineering, a dev shop from Hungary, mostly working with rich text editors, CRDTs. PCBJam started as my (Viktor, CTO, ex-electrical engineer) hobby project but as time went on I put more and more energy into it, and a product started shaping up in my head, in the last few months we’ve started to focus on this project a bit more, and this is the first MVP~ish result. This project is a ton of fun, ton of learning, ton of improvements over improvements: - I thought there must be ways to emulate the PCB canvas OpenGL code on the web. And yes, there are a lot of ways, all of them very buggy. Turns out it’s faster to just write WebGL code that works with KiCad’s Graphics Abstraction Layer if you add the right intermediate debugging steps. I (with Claude) implemented the features and compared

Generate AI demo videos from a product URL for marketing and social media.
u/Rae_Shin_ · Reddit
Why spend hours making demo videos? Paste a URL and let AI do it These days everyone is building products, but promoting them is a completely different challenge. Recording demos, editing videos, adding captions, and making content for Shorts, TikTok, Reels, or ads takes a lot of time. So I built Screenzy.pro. Just paste your product URL, and it automatically creates product demo videos that explain what your product does. It works well for social media content, launch videos, tutoria

Create beautiful screenshots and progress cards ready to share with your audience.
@shreyassihasane · X

Compile and preview Typst documents directly in your browser using WebAssembly.
will-bradshaw · HN
Typst-WASM – Compile Typst in browsers, Node, and serverless runtimes

Extract live web data via API or MCP server for your AI agents.
mariusbolik · HN
Webstractor – Pay-as-You-Go Web Data API for AI Agents

Create webtoons and comics from text stories with AI and export in 4K with multiple art styles.
StarVeil AI - 星河入梦 — 使用AI生成连续漫画的网站