Developer tools apps for Windows

Personal FTP Server

Developer tools

Share one folder from this PC over FTP. Pick it, set a username and password, press the key, and the address to type is on the plate. Read-only when you only want people to download.

Python Script IDE

Developer tools

A real editor for Python scripts — syntax color, a tab per file, and a Run button. Python 3.14 ships inside, so there is nothing to install.

Rapid FTP Server

Developer tools

Share a folder with every device on your Wi-Fi. Turn it on, then scan the tag with a phone camera or type the address into File Explorer or any FTP app. Read only by default, with a generated password, and only your own network can reach it.

C and C++ Compiler

Developer tools

Write C or C++, press F5, and it compiles and runs. Clang ships inside, so there is nothing to install — and old Turbo C programs with conio.h run too.

Rapid HTTP Server

Developer tools

Serve a folder as a website on your Wi-Fi and watch the real page at desktop and phone width as you work. Save a file and every open page reloads by itself. No administrator rights, any port, and a file list for folders without an index page.

HTTP Server

Developer tools

Turn a folder on this PC into a web address anything on your network can open. Pick the folder, click the steel plate, and it lights up with a code your phone's camera can read. Every request that arrives is listed as it happens, with the status it was answered. Read-only throughout: it hands files out and never takes any in.

JSON Validator

Developer tools

JSON Validator checks your JSON and repairs it when it's broken. Single quotes, trailing commas, comments, missing commas and files cut short are fixed and marked, right on your PC. Fix the JSON on your clipboard with one shortcut, compare two files, and turn a sample into TypeScript, C# or a JSON Schema.

Self Signed Certificate Maker

Developer tools

Trusted HTTPS for localhost in one click. Self Signed Certificate Maker makes your own local certificate authority, trusts it in Windows and Firefox, and issues a certificate your browser accepts with no warning. Wire it into a Vite, ASP.NET, IIS Express or Node project, export it as PFX or PEM, and check any certificate for problems.

HTML and CSS Editor

Developer tools

Write a web page in HTML and CSS and watch it build beside your code as you type. Start from one of eight finished templates, or a blank page.

GUID and UUID Generator

Developer tools

Make GUIDs and UUIDs one at a time or a million at once. Click any ID to copy it, copy a batch as JSON, SQL, C# or CSV, type a new one in any app with a shortcut, and decode the IDs you find to see when they were made.

Java Compiler

Developer tools

Write Java, press F5, and it runs. OpenJDK 25 ships inside, so there is nothing to install — no JDK download, no PATH, no project to set up.

Regex Tester

Developer tools

Regex Tester reads your regular expression back in plain English, piece by piece, and lights up the matches in your own text or a whole folder of files. Pick your language, from C# to Python, and the matches follow its rules. Preview a replace across every file, then undo it in one click.

JSON to NDJSON

Developer tools

Turn a JSON array into NDJSON, one record a line, and turn NDJSON back into JSON. Paste it, open it or drop it in, see the records and the count, and save. Big files stream from disk, and a mistake is shown with its line and column. Everything stays on your PC.

Lorem Ipsum Maker

Developer tools

Placeholder text that fits. Set words, sentences or paragraphs in seven languages, or fit the text to a tweet, a meta description, a blog card or an app store subtitle, ending on a full sentence. Click the page to copy it as text, HTML or Markdown.

Simple Lorem Ipsum

Developer tools

Placeholder text in one click. Point at a line on a little index card in the tray, click, and that many words, sentences or paragraphs of lorem ipsum are on the clipboard. Open it from any app with Ctrl+Alt+L.

JavaScript Runner

Developer tools

Write JavaScript, press F5, and it runs on the Node.js inside the app. Nothing to install, no terminal, no browser tab.

Serial Terminal

Developer tools

A serial monitor for Arduino, ESP32, Raspberry Pi Pico and any COM port. Text, hex and live plot views, hex sending, saved commands, logging to a file, and automatic reconnect when the cable comes back.

Step Guide Recorder

Developer tools

Do a task once and get a step-by-step guide. Step Guide Recorder turns every click, the text you type and the keys you press into numbered steps, each with a screenshot and a sentence written for you. Reword it, blur what is private, and export it as a PDF or Markdown.