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    Developer Tools

    JSON, Base64, regex & dev utilities

    JSON Formatter

    Format, validate & flatten JSON to a single line for GitHub secrets

    Base64 Encoder

    Encode & decode Base64

    Regex Tester

    Test regular expressions

    Color Picker

    Pick & convert colors

    UUID Generator

    Generate unique identifiers

    Cron Explainer

    Parse cron expressions

    JWT Decoder

    Decode JSON Web Tokens

    JSON to TypeScript

    Convert JSON to TS interfaces

    Timestamp Converter

    Unix epoch ↔ human dates

    JSON to CSV

    Convert JSON arrays to CSV

    Slug Generator

    Create SEO-friendly URL slugs

    Box Shadow Generator

    Visual CSS box-shadow builder

    Number Base Converter

    Binary, octal, decimal, hex conversion

    URL Encoder / Decoder

    Encode/decode URLs and query strings

    CSV ↔ JSON Converter

    Convert between CSV and JSON formats

    YAML ↔ JSON Converter

    Convert between YAML and JSON

    SQL INSERT → JSON/CSV

    Parse SQL INSERT statements into JSON or CSV

    Curl Command Parser

    Visualize curl command components

    .env File Validator

    Validate .env syntax & flag security risks

    Log Analyzer

    Parse logs & highlight errors, warnings

    Combine Files for AI

    Merge TXT, CSV, code & logs into one AI-ready bundle

    Free Online Developer Tools

    Productivities.net offers a comprehensive suite of free developer tools designed to streamline your daily coding workflow. Whether you're a front-end developer debugging API responses, a back-end engineer working with configuration files, or a data analyst inspecting datasets, our browser-based utilities save you time and protect your privacy.

    Our developer toolkit includes a powerful JSON Formatter that validates and beautifies JSON data with customizable indentation, a Base64 Encoder/Decoder for quick string and file encoding, a Regex Tester with real-time pattern matching and highlighting, a Color Picker with HEX/RGB/HSL conversion, a UUID Generator for creating unique identifiers, a Cron Expression Explainer that translates complex schedules into human-readable text, and a JWT Decoder for inspecting JSON Web Tokens without exposing sensitive data to third-party servers.

    All tools run entirely in your browser using modern JavaScript — no server uploads, no data collection, no signup required. Your code, tokens, and data never leave your device. This makes our tools ideal for working with sensitive API keys, proprietary configurations, and production data. Bookmark this page and make it part of your daily development workflow.

    👉 Looking for the indexed long-form overview? Browse The Developer's Ultimate Toolbox — every developer tool grouped by use case (Data & Formatting, Encoding & Security, Code Utilities, Visual & Design) with a one-line description for each.