Are these developer tools secure and private?

Yes, absolutely. All computations, cryptographic random number generations, hashing, and conversions run entirely inside your browser via standard Web Crypto and Canvas APIs. No data, files, keys, or passwords ever leave your machine or get sent to any server.

Can I use these tools offline?

Yes! Because the suite contains zero backend dependencies, you can load the pages and continue using the generators even when disconnected from the internet.

Which developer tools are included in this suite?

The suite includes a Password & Passphrase Generator, UUID v4/v7 Generator & Decoder, API Token & Secret Key Generator, Hash & HMAC Checksum Tool, JSON Formatter & Validator, Base64 & Data URI Converter, Lorem Ipsum & Mock Data Generator, and a Custom QR Code Generator.

antare74 · web tools

Developer Tools

A suite of everyday utilities and generators built for developers. Fast, private, and running 100% on your device — no backend, zero data leaves your browser.

Security & Identifiers

Security

Password Generator

Generate cryptographically secure passwords, readable passphrases, and PINs with entropy meters.

RFC 4122 / 9562

UUID / GUID Generator

Generate random UUID v4, time-ordered UUID v7, v1, and decode timestamps from existing UUIDs.

Auth & API

Token & Secret Key

Generate cryptographically strong API keys, Hex secrets, Base64URL tokens, NanoID, and ULIDs.

Crypto

Hash & Checksum

Compute and verify MD5, SHA-1, SHA-256, SHA-512, CRC32, and HMAC signatures for text and files.

Data & Formats

JSON

JSON Formatter & Validator

Beautify, validate syntax with error diagnostics, minify, and sort object keys in real-time.

Encoding

Base64 & Encoders

Encode & decode UTF-8 Base64 strings, convert binary files to Data URIs, URL encode, and HTML entities.

Content

Lorem Ipsum & Mock Data

Generate customizable placeholder text and realistic test user records in JSON, CSV, or SQL format.

Visual

QR Code Generator

Generate customized QR codes for URLs, WiFi credentials, WhatsApp chats, vCards, and text with instant download.

Looking for PDF Utilities?

Check out the 15-tool browser-based PDF suite: merge, split, compress, sign, watermark & convert.

Explore PDF Tools →

Why Use In-Browser Developer Utilities?

As developers, we frequently need to generate random authentication tokens, format raw JSON responses, inspect UUID timestamps, or compute SHA-256 file hashes. Most traditional online tools send your private inputs to remote backend servers where they can be logged, stored, or intercepted.

Developer Tools by Aris Wahyudiyanto was engineered with a strict Zero-Knowledge, Client-Side First architecture. By leveraging modern Web APIs like the Web Crypto API, Canvas API, and FileReader API, every single operation executes on your CPU right inside your browser.

Are generated passwords and tokens cryptographically secure?

Yes. All password and secret token generation uses window.crypto.getRandomValues() (CSPRNG), providing true entropy suitable for production secrets, encryption keys, and session IDs.

What is UUID v7 and why should I use it?

UUID v7 is the modern RFC 9562 standard for time-ordered UUIDs. It combines a 48-bit millisecond Unix timestamp with cryptographic randomness, making it optimal for database primary keys with high B-Tree indexing performance.

Do files or text get uploaded when computing checksums?

Never. File checksums (MD5, SHA-1, SHA-256, SHA-512) are computed in memory using the browser's native crypto stream. No bytes leave your device.