What is DevUtils Pro?

DevUtils Pro is a free online collection of 26 developer utilities including hash generators (MD5, SHA-1, SHA-256, SHA-512), Base64 encoder, JSON formatter, QR code generator, regex tester, UUID generator, password generator, IP subnet calculator, AES text encryption, SSH key generator, TOTP/OTP code generator, crontab builder, case converter, and code minifiers. All tools run entirely in your browser — no data is sent to any server.

Is DevUtils Pro free to use?

Yes, DevUtils Pro is completely free. There is no sign-up, no subscription, and no hidden fees. All 26 tools are available instantly.

Is my data safe when using DevUtils Pro?

Yes. All processing happens 100% in your browser using JavaScript. No data, text, passwords, or files are ever sent to any server. DevUtils Pro has no backend — it is a purely client-side application.

How do I generate an MD5 or SHA-256 hash online?

Open DevUtils Pro and click 'Hash Generator' in the sidebar. Type or paste your text and the MD5, SHA-1, SHA-256, and SHA-512 hashes are computed instantly in your browser.

How do I generate a QR code online for free?

Open DevUtils Pro and click 'QR Code Generator'. Enter any URL or text, choose the size and error correction level, then click Generate. You can download the QR code as a PNG image.

DevUtils Pro – 27 Free Online Developer Tools | Indian GST Calculator, MD5, SHA, Base64, JSON, QR Code

DevUtils Pro is a free, privacy-first collection of developer utilities that runs entirely in your browser. No sign-up, no server calls, no data collection — everything is processed locally using JavaScript and the Web Crypto API.

Rate	GST Amount	Total (incl.)	CGST	SGST
Enter an amount to see all rates

🔐 Hash Generator

Generate MD5, SHA-1, SHA-256, and SHA-512 cryptographic hashes instantly. Also supports HMAC generation and file hashing (SHA-256). Uses the browser's Web Crypto API for SHA hashes and blueimp-md5 for MD5.

📦 Base64 Encoder / Decoder

Encode plain text or binary data to Base64, or decode Base64 strings back to readable text. Supports file input for binary-to-Base64 conversion. Useful for API payloads, email attachments, and data URIs.

🔗 URL Encoder / Decoder

Percent-encode URLs and query strings for safe transmission over HTTP, or decode percent-encoded URLs back to readable form. Essential for building REST APIs and web scrapers.

🎨 JSON Formatter & Validator

Prettify, minify, validate, and sort keys in JSON documents. Supports configurable indentation (1, 2, or 4 spaces). Highlights syntax errors and shows byte size before and after formatting.

▣ QR Code Generator

Generate QR codes from any URL or text string. Choose from 4 sizes (128px to 400px) and 4 error correction levels (Low, Medium, Quartile, High). Download the QR code as a PNG image.

🔒 AES-256 Text Encryption

Encrypt and decrypt text using AES-256-GCM with PBKDF2 key derivation (100,000 iterations, SHA-256). Output is Base64-encoded. Your passphrase and data never leave your browser.

🗝️ SSH Key Generator

Generate RSA 2048-bit, RSA 4096-bit, EC P-256, or EC P-384 key pairs using the Web Crypto API. Output is in standard PEM format (PKCS#8 private key, SPKI public key).

📱 TOTP / OTP Code Generator

Generate time-based one-time passwords (TOTP) compatible with Google Authenticator and other MFA apps. Implements RFC 6238 using HMAC-SHA1. Codes refresh every 30 seconds with a live countdown timer.

🛡️ Password Generator

Generate cryptographically secure random passwords using the Web Crypto API. Configurable length (4–64 characters) with options for uppercase, lowercase, digits, and symbols. Includes a password strength indicator.

🌐 IP Subnet Calculator

Calculate subnet information from CIDR notation (e.g., 192.168.1.0/24). Computes network address, broadcast address, subnet mask, wildcard mask, first/last usable host, usable host count, and binary representation.

⏰ Crontab Generator

Build cron expressions visually with a 5-field builder (minute, hour, day, month, weekday). Includes 10 common presets and generates a human-readable description of the schedule.

🔄 Case Converter

Convert text between 12 different case formats: camelCase, PascalCase, snake_case, SCREAMING_SNAKE_CASE, kebab-case, COBOL-CASE, dot.case, path/case, Title Case, Sentence case, UPPER CASE, and lower case.

🧮 Percentage Calculator

Three calculation modes: find what X% of Y is, calculate what percentage X is of Y, or compute the percentage change between two values. Results update in real-time as you type.

⚡ JS / CSS / HTML Minifiers

Minify JavaScript, CSS, and HTML to reduce file size. Shows original size, minified size, bytes saved, and percentage reduction. Regex-based approach — fast and works entirely offline.

🔑 UUID v4 Generator

Generate multiple cryptographically random UUID v4 identifiers at once (1–50). Copy individual UUIDs or copy all at once. Uses the Web Crypto API's getRandomValues for true randomness.

🔍 Regex Tester

Test JavaScript regular expressions against strings in real-time. Toggle flags (global, case-insensitive, multiline, dot-all), view match count, and see all matches highlighted inline.

🇮🇳 Indian GST Calculator

Calculate Indian Goods and Services Tax (GST) for all standard slabs: 5%, 12%, 18%, and 28%. Supports both exclusive mode (add GST to a base price) and inclusive mode (extract GST from a GST-inclusive price). Shows CGST, SGST breakdown and a comparison table for all rates at once. Ideal for invoicing, billing, and e-commerce calculations.

DevUtils Pro · 27 free developer tools · No sign-up · 100% client-side · Open source on GitHub

About DevUtils Pro — 27 Free Online Developer Tools