Free tools
Free Online Tools for Bloggers, Founders and Developers
Small, fast utilities for bloggers, founders and developers. No account, no watermark, nothing uploaded.
- Browser-based
- No sign-up
- Always free
These are free online tools for bloggers, founders and developers: small browser-based tools for people who publish online, build products or run a website. Each one works in your browser with no sign-up, no watermark and no upload, so what you type stays on your device. They are built and tested on this site first, and every tool page explains what it does, where the numbers or settings come from, and what it leaves out.
- Free tool
Free Social Share Card & Open Graph Image Generator
Design a 1200×630 social share card in your browser and download it as a PNG. No watermark, no sign-up, nothing uploaded.
Open the tool - Free tool
App Store Fee & Net Profit Calculator for Micro-SaaS Apps
Compare Apple, Google Play, Stripe and merchant-of-record fees and see your net profit per month. Free, runs in your browser.
Open the tool - Free tool
Bulk Plain Text & Markdown File Merger and Converter
Combine many .txt and .md files into one, reorder them and export as Markdown, text or HTML. Free and private.
Open the tool
How these free online tools for bloggers and founders work
A tool on this page is a single web page with its own script. It does the work in your browser and does not need an account or an API key. When a tool needs outside information, such as a platform’s current image size or a store’s current fee, the page says where the figure comes from so you can check it. If you have a tool you would like to see, use the contact form.
Looking for calculators for AI and SaaS costs instead? See the AI Toolkit.