Developer Tools

Format JSON, encode/decode Base64, and help with daily developer tasks.

30 Tools Available

Code Utilities

9 tools

JSON Formatter

Format, validate, prettify, and minify your JSON data quickly.

JSON Format Corrector

Automatically fix invalid or messy JSON, Python dictionaries, unquoted keys, single quotes, and trailing commas. Includes interactive tree visualization and code generator.

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Regex Tester

Test regular expressions live with match highlighting, flags, and group capture support.

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Markdown Previewer

Write Markdown and see a live rendered preview side by side. Supports headings, lists, code, and more.

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CRON Expression Builder

Build, validate, and understand CRON expressions with a visual editor and human-readable descriptions.

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JSON ? CSV Converter

Convert JSON arrays to CSV and CSV files back to JSON with type inference and file download.

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Text Diff Checker

Compare two blocks of text side-by-side to highlight differences.

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JSON to TypeScript Generator

Convert JSON payloads into strongly-typed TypeScript interfaces locally.

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AI Prompt Token & Cost Estimator

Estimate prompt tokens and calculate API usage costs for OpenAI, Claude, and Gemini.

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Encoding & Crypto

11 tools

Password Strength Checker

Analyze how secure your password is and generate a strong one instantly.

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Binary ? Text Converter

Convert plain text to binary code and decode binary back to readable text.

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Text to Binary Converter

Convert letters and strings into computer binary format.

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Hex ? ASCII Converter

Convert text to hexadecimal and decode hex strings back to readable ASCII text.

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Number System Converter

Convert numbers between binary, octal, decimal, and hexadecimal instantly with grouped display.

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File Hash Checker

Generate and verify SHA-1, SHA-256, SHA-384, and SHA-512 hashes for files and text locally.

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Hash Generator

Generate SHA-1, SHA-256, and SHA-512 cryptographic hashes.

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JWT Decoder

Decode JSON Web Tokens (JWT) perfectly securely.

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Base64 Encoder / Decoder

Encode plain text into Base64 format or decode it back instantly.

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Bcrypt Hash Generator & Verifier

Generate Bcrypt password hashes or verify them locally inside your browser.

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Secure Local Password Generator

Create cryptographically secure random passwords locally.

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Design Helpers

4 tools

CSS Unit Converter

Convert between CSS units: px, rem, em, pt, vw, vh, cm, mm, and inches.

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Aspect Ratio Calculator

Calculate aspect ratios, missing dimensions, and simplify ratios for any image or screen size.

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Local SVG Optimizer

Minify and optimize SVG graphics entirely in your browser without uploads.

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Tailwind CSS Palette Generator

Generate beautiful Tailwind CSS color palettes and config blocks.

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Build & Deploy

5 tools

QR Code Generator

Create and download customized QR codes for URLs, text, and contacts.

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UUID v4 Generator

Generate cryptographically secure Version 4 UUIDs instantly.

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URL Encoder / Decoder

Safely encode URI components or decode gibberish URLs into readable strings.

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UTM Link Builder

Generate trackable campaign links for analytics.

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.env Syntax Validator

Validate environment variable syntax and detect credentials leaks locally.

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Converters

1 tool

Markdown to HTML Editor

Live Markdown to HTML converter and editor.

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Streamline Your Coding Workflows

Developers use dozens of small utilities throughout the day: prettifying API outputs, generating cryptographically secure UUIDs, or writing cron schedules. Opening heavy local IDEs or command line scripts is often inconvenient.

Our developer suite brings these essential resources directly into your web browser. All cryptographic calculations, text diffs, and formatting operations run entirely client-side, keeping your tokens, passwords, and logs secure.

How to Use Developer Utilities

1Select the developer utility from the directory (e.g. JSON Formatter, Regex Tester, or UUID Generator).
2Paste your raw inputs, configuration variables, or target codes into the code editor component.
3Check for instant validations, lint errors, or computed variables displayed on screen.
4Copy the generated output, QR code, or verified formatting directly into your workspace.

Why Trust Our Online Developer Utilities?

Absolute Privacy for Code & Keys

Your strings, tokens, and payloads are processed strictly inside your local tab memory.

Error-Detecting JSON Linting

Identify syntax mistakes, missing commas, and unbalanced brackets in real time with line highlights.

Secure Hashing & Encoding

Compute MD5, SHA-1, SHA-256, and Bcrypt hashes, or translate strings into Base64 formats locally.

Clean Diff Checkers

Compare two code blocks side-by-side to track additions, deletions, and line-by-line modifications.

Frequently Asked Questions

Is it safe to paste API payloads or JWT tokens into the JSON Formatter?

Yes, it is entirely safe. Our application uses zero network-dependent formatting endpoints. All JSON parsing and formatting are executed locally using Javascript. No data leaves your machine.

How are the UUIDs generated?

We use the cryptographically secure `crypto.getRandomValues()` Web API to generate RFC4122-compliant version 4 UUIDs, ensuring high randomness and zero collisions.

Why do you calculate file hashes locally?

Calculating hashes (like SHA-256) inside the browser via the HTML5 File API means you can verify file integrity without uploading large gigabyte files over the internet, saving bandwidth and ensuring privacy.

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