Learn by doing: free tools for your first API, your first JWT, your first regex
No install, no config, no sign-up. Just paste your data and see what happens. Every tool runs in your browser so you can experiment safely.
Your first...
Every developer remembers these moments. These tools make them less confusing.
Your first API response
Called an API and got a wall of text back? JSON Formatter turns that jumble into something you can actually read.
Your first authentication token
JWTs look like random gibberish, but they carry real data. JWT Decoder shows you the header, payload, and expiration hiding inside.
Your first regular expression
Regex is easier when you can see matches light up as you type. Regex Tester lets you experiment without breaking anything.
Your first hashed password
Ever wonder how passwords get stored safely? Hash Generator lets you type a word and see its SHA-256 hash instantly.
Why beginners love Septim Forge
No installation required
No npm, no pip, no brew. Open your browser, pick a tool, and start using it. Works on any computer, any OS.
Safe to experiment
Every tool runs entirely in your browser. Your data never leaves your machine, so you can paste real code and real tokens without worry.
Free forever
16 tools, zero cost, no sign-up, no credit card. Use them as often as you need while you learn.
Learn while you build
Short guides written for people who are just getting started.
Great tools to start with
You do not need all 16 tools on day one. Here are six that new developers reach for most.
JSON Formatter
Paste messy JSON, get clean, readable output
Base64 Encode/Decode
Encode and decode strings you see in APIs and configs
UUID Generator
Generate unique IDs for your database records
Hash Generator
See how hashing turns any text into a fixed-length string
Password Generator
Create strong passwords and learn what makes them secure
Lorem Ipsum
Generate placeholder text for your first web page
When you are ready for advanced tools
Once you are comfortable with the basics, Septim Forge Pro adds Diff Checker, SQL Formatter, CSV/JSON converters, and more. No rush — the free tools are yours forever.
Explore Pro tools