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Free Developer Tools

A handy set of everyday tools for backend & full-stack developers. Everything runs right in your browser — nothing is uploaded, nothing is stored. Bookmark this page. 🔖

JWT Decoder

Decode & inspect JSON Web Tokens instantly

JSON Formatter

Format, beautify & validate JSON

Base64 Encode / Decode

Encode & decode Base64 text

UUID Generator

Generate random UUID v4 IDs

Hash Generator

SHA-256 / SHA-1 / SHA-512 hashes

Unix Timestamp Converter

Convert Unix time ↔ human date

Cron Expression Generator

Build & understand cron schedules

Regex Tester

Test regular expressions live

SQL Formatter

Beautify messy SQL queries

Password Generator

Create strong, random passwords

JSON to CSV Converter

Convert JSON into CSV / Excel

JSON to YAML Converter

Convert JSON into clean YAML

Markdown Preview

Write Markdown, see it live

Color Picker & Converter

Pick colors & convert HEX/RGB/HSL

.env to JSON Converter

Convert .env files into JSON

QR Code Generator

Make a QR code from any text/URL

GitHub Profile README Generator

Build an awesome GitHub profile README

Developer tools that respect your privacy

Whether you're debugging a JWT, formatting messy JSON, generating UUIDs for your database, or converting a Unix timestamp — these tools save you time without sending your data to any server. They're built and maintained by AS Backend Institute, where we train developers to build production-grade backends with Node.js, Express, MongoDB, MySQL and Redis.

New to backend development? Start with our free resources and courses →

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Instant doubt resolution

Job & internship alerts

Free resources & notes

Direct access to mentors

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