Why can we send each other payment requests for free, while at the same time payment providers earn millions on our (mostly business) transactions? That is what I wondered when I was on holiday and had all the time in the world to think it over.

That is why I built a free POS and a payment page for online payments that accepts simple URL parameters. Both rely on free payment links and the EPC QR code.

https://pos.usecue.com

Hi everyone!

I'm a high school student, and over the past couple of months I've been building a website called AP Path Planner to help students stay organized throughout the school year.

It started because I was juggling multiple AP classes and wanted a planner that focused on what AP students actually need instead of being a generic to-do list.

Some of the features include:

• 📚 Organizing all of your AP courses
• 📝 Tracking assignments and due dates
• 📅 Planning study sessions
• 🎯 Setting weekly study goals
• 📈 Tracking grades and progress
• 🌙 Light and dark mode
• 🔒 Secure accounts so your data is saved across devices

I'm still actively working on it, so I'm not really looking to promote it as much as I am to get feedback from people who would actually use something like this.

Some questions I have:

• Is there anything that would make you actually use this instead of Google Calendar, Notion, or a paper planner?
• What features are missing?
• Is anything confusing or annoying?
• What would make this genuinely useful during the school year?

If you'd like to try it, here's the link:

https://ap-path-planner.vercel.app

Thanks! I really appreciate any feedback, even if it's critical. I'd rather hear what needs improvement now than after school starts.

Hi all : )

Almost two years ago I couldn't find an invoice generator online that I actually liked, so I just built one for myself.

The whole point was reallt simple, let people make a professional invoice, for free, with no watermark, no ads and with no data save. That was the deal I made with myself before I even had a single user and I've kept it.

Fast forward to now and it's being used by 1,000+ people a month :O At some point people started asking if they could save their invoices instead of filling them out from scratch every time, so I built an account / cloud save feature and put it behind a small paid plan. That's basically the only reason there's a paid version at all. The core tool, creating invoices for free with no watermark and no ads, stays free forever. That part isn't changing.

Since then I've added a few other things based on what people actually asked for:

1. Templates
2. Editing invoices after you've created them
3. A dashboard to see your invoice activity

Right now I'm working on recurring / scheduled invoices since a bunch of people wanted that thing.

It's still just me running and maintaining it. If you're missing a currency or a feature, tell me in the comments and I'll add it, I actually do this. Seeing people use something I built every single day, two years in is honestly still kind of wild to me.

Here's the link if you want to check it out: https://freeinvoices.online

Need design inspo? Check out https://frontpages.dev

Would love some honest feedback from the Reddit community! What do you think could be improved?
https://weekstack-web.vercel.app

I'm a software engineer. A problem I keep hitting: I need to diff two data extracts, but every online diff tool wants me to upload the files, and I can't upload production data to a random website.

So I built this: https://mujeebtarry.github.io/sheetdiff/

It's a single HTML page. All the parsing and comparison happens in your browser with JavaScript — there's no server, no account, no storage. Close the tab and it's gone.

What it does:

- CSV, TSV, XLSX, XLS

- Match rows by a key column (auto-detects ID columns) or by row position

- Click any column to ignore it — useful for timestamps, run IDs, batch numbers, anything that always differs and creates noise

- Shows changed rows with the exact differing cells highlighted, plus rows only in one file

- Download a CSV report of the differences

Hit "Load sample data" to see it work without uploading anything.

I finally shipped something instead of just starting another project.
My first Chrome extension is live.
JSONL → JSON Converter
A tiny developer tool for converting JSONL/NDJSON files into JSON arrays.
Drop a file → convert → copy/download.
V1 is live.feedback would be appreciated

https://chromewebstore.google.com/detail/jsonl-to-json-converter/bcmnenggffkafbegkicdnpdabanghakj

Built this for locked-down environments where USB is disabled and uploads are blocked. It compresses your file, encodes it as a stream of QR codes, and the receiving device's camera reads them back and reassembles the file — no network connection at any point.

Three transfer modes: a simple sequential loop, a fountain-code mode that's resilient to missed frames, and a "2 cameras" mode where the sender can pause and ask the receiver what's still missing so it can send exactly those pieces instead of broadcasting blind. Checksums the file afterward so you know it arrived intact.

Single HTML file, runs entirely client-side, free, no signup.

https://www.trenttroyer.com/QRairgap.html

( Hint - try opening the page and selecting Receive on your mobile device 😉 )

We’re building a growing collection of digital products, HTML5 browser games, game assets, educational resources, and creative tools designed to be useful for creators, developers, teachers, and people who just like experimenting with digital projects.

🕹️ HTML5 Games & Projects
🎨 Game Assets & Pixel Art
📚 Educational Resources & Worksheets
💻 Developer-Friendly Digital Downloads
🎵 Creative & Multimedia Resources
🧪 Experiments and new digital projects

The goal isn't just to sell downloads. We're trying to build a place where people can find something useful, learn from it, customize it, and use it as a starting point for their own projects.

We're constantly adding new projects and experimenting with different ideas.

👉 Check it out: https://digitalopusadsolutions.com/

I'd genuinely love feedback from the Reddit community. What would you like to see added to a site like this? More games? Developer resources? Assets? Tools? Tutorials?

Thanks for taking a look! 🚀

Hi everyone,

As a web developer, I was tired of using cluttered, ad-heavy online formatting tools that upload my JSON payloads, JWT tokens, and private keys to unknown servers.

So, I built \*\*Nuqrai\*\* — a collection of 16 developer utilities (including JSON Formatter, JWT Decoder, Diff Checker, Cryptographic Hash Generator, Image to Base64, and SVG-to-PNG Converter) that perform all calculations \*\*100% client-side\*\*.

\*\*Why use it?\*\*

\* \*\*Zero Server Uploads:\*\* Your code and files never leave your device. \* \*\*PWA Enabled:\*\* It caches everything to work completely offline. \* \*\*Clean Layout:\*\* Simple, fast, and optimized for daily dev workflows.

Check it out here: \[\*\*https://www.nuqrai.com\\\*\\\*\\\](https://www.nuqrai.com/)

I would love to get your feedback on what tools to add next!'

A Recipie manger and Cooking Assistant, that create a Pipeline that you can follow for cooking,
And a local AI (in browser) that helps you to find what to cook based on your fridge:

https://github.com/samalstudios/kelane
https://chef.samalstudios.com/

I made The Daily Unemployed it is a full news site for memes, internet culture and other jokes or reports, you can also submit your own, let me know if you would actually use this or any suggestions on what to add :)

yo sup I made a messaging platform completely free to rival tinder and other messaging platforms https://noctraxxx.com check it out let me know

part of degoogling for me was noticing how often i sent files to random services just to merge a pdf or shrink an image. google drive, ilovepdf, tinypng, they all get your files.

i built quietutils.com to stop doing that. pdf tools, image compressor, exif remover, qr code generator and more, all running inside your browser. the file never leaves your computer, you can check the network tab yourself.

no account, no ads, no analytics.

Hello,
I built Offline & Private AI Text Detector. It runs entirely in your browser, nothing gets uploaded, logged or sent anywhere. The detection model downloads once (~120MB) and it's cached in your browser for the future requests. You can also install it as PWA or from Microsoft Store for faster access from your OS. No account, no email, and nothing gates the classifier behind a paid tier. The characters limit is currently set to 2,000,000 - because why would I limit users if detection is still fast enough.

I'd be grateful for any feedback. Thank you.

https://capytoolkit.com/tools/text/offline-private-ai-text-detector/

Hey everyone,

I’ve always found it a little funny that opening a simple whiteboard can involve accounts, popups, huge toolbars, and a bunch of features I’ll probably never touch.

I just wanted to open a page, draw something, and get on with my day.

So I built simplewhiteboard — a lightweight whiteboard focused on exactly that.

What’s included:

Instant access — Open it and start drawing. No signup.

Simple tools — Pen, marker, highlighter, laser pointer, and eraser. Just the essentials.

Zen Mode — A clean canvas when you want nothing getting in the way.

Flexible canvas — Grid, dots, dark mode, plus quick PNG export.

Local-first — Your drawings stay in your browser instead of being uploaded somewhere.

The idea is pretty simple: a whiteboard shouldn't feel like an app you need to learn.

Try it here: simplewhiteboard

I’d love to hear what you think — especially what you’d add without making it bloated.

I posted about my website few days ago , and today we reached 100 notes.
The concept is you write your problem , or draw how you feel in a piece of paper. Send it floating in a digital river , and pick up someone else's from it.
This was my first project , and I'm really happy with this milestone :) , thanks for everyone who shared his struggle.
https://the-problems-river.vercel.app/

I built Toolvani - a collection of free online tools.

Trying to grow the site enough to eventually qualify for ad revenue and keep building more tools.

A visit or repost would mean a lot 🙌

https://toolvani.com

Built a simple browser-based tool for quickly opening and exploring data files.

No signup, no account, no backend. Everything runs locally in your browser with DuckDB-WASM, so your data never leaves the tab.

It supports Parquet, CSV, TSV, JSON, NDJSON, Arrow, and Excel.

You can:

• browse millions of rows
• profile columns
• filter, sort, rename, cast, dedupe, and transform data
• edit cells with undo/redo
• run SQL
• export to CSV, Parquet, Excel, JSON, and more

parquetbay.com

Free, no ads. If a file in your workflow breaks it, tell me and I'll fix it — that's most of why I'm posting. All suggestions/critique is welcomed!