TinyPNG compresses and converts images in the browser using a smart lossy method on AVIF, WebP, JPEG and PNG; the official claim is up to eighty percent smaller, the free tier takes twenty images at five megabytes each.

Vercel is a deployment platform that attaches to a Git repository and builds plus publishes on every push, so no server or pipeline has to be maintained; the zero cost Hobby tier already bundles a global content network and traffic insights.

A front end editor and developer community in the browser, with three panels holding HTML, CSS and JavaScript side by side, every change showing in the preview at once, and a finished pen published as a public address in one click.

Open a page and the environment is already running: a full runtime inside the browser, dependencies installed on arrival, instant preview, and a link that reproduces your setup exactly.

ray.so turns a few lines of code into a presentable image in three steps: open the page, paste the code, pick a style. Dozens of languages are highlighted, themes are chosen rather than piled up, backgrounds take presets or a custom angle and colour, window size and padding are adjustable, and the export runs at 2x for high-resolution slides. No account, no watermark, and the whole project is open source.

An open source terminal emulator for Windows, macOS and Linux that also runs in a browser. SSH, SFTP and serial connections live in the same window, panes split in any direction, and eighteen built-in plugins extend it without leaving the app.