Smart Unit Converters

Utility Calculators & Converters

Handy utilities for developers, writers, and everyday use.

20 tools

About Utility

Everyday utility tools for developers, writers, designers, and curious users — password generator, word counter, case converter, color converter (HEX/RGB/HSL/CMYK), QR code generator, barcode generator, base converter (binary/octal/decimal/hex), Unix timestamp, regex tester, JSON/YAML/CSV converters, base64, URL encoder, hash calculator, UUID generator, markdown converter, image format converter, IBAN validator, and lorem ipsum.

Whether you're hashing a password, generating 100 UUIDs for a database seed, encoding a URL for a query string, validating a customer's IBAN, counting words in an essay, or converting an SVG to PNG — these tools save you a Google search and a sketchy third-party site visit.

Developer-grade

Output formats match what production code expects — UUIDs follow RFC 4122, Base64 follows RFC 4648, hashes are NIST-standard.

Privacy-first

Passwords, secrets, hashes, and source data never leave your browser — all processing is client-side JavaScript.

Bulk + batch ready

Most tools accept multi-line input — paste 1000 lines, get 1000 results. No pagination, no API key required.

Most Used

Most Popular in Utility

The 4 tools our users open most often in this category.

4 picks

Convert between binary, decimal, hexadecimal, and octal number systems.

Unix Timestamp Converter

Convert between Unix epoch timestamps and human-readable dates.

Color Converter

Convert between HEX, RGB, and HSL color formats with live preview.

Count words, characters, sentences, paragraphs, and estimate reading time.

All Utility Tools

Browse all 20 calculators

Convert between binary, decimal, hexadecimal, and octal number systems.

Unix Timestamp Converter

Convert between Unix epoch timestamps and human-readable dates.

Color Converter

Convert between HEX, RGB, and HSL color formats with live preview.

Count words, characters, sentences, paragraphs, and estimate reading time.

Convert text between UPPERCASE, lowercase, Title Case, camelCase, and more.

Password Generator

Generate strong random passwords with customizable length and character sets.

Text Reverser / Palindrome Checker

Reverse text by characters or words and check for palindromes.

QR Code Generator

Create QR codes from URLs, text, Wi-Fi, contact cards, email, phone, SMS, and locations. Free PNG and SVG download.

Barcode Generator

Generate Code 128, EAN-13, UPC-A, Code 39, ITF-14, and more. Free PNG and SVG download with format-aware validation.

Test JavaScript regular expressions against sample text with live highlighting, named groups, and quick patterns.

JSON ↔ YAML Converter

Convert between JSON and YAML in either direction. Live preview, parse-error reporting, copy + download.

JSON ↔ CSV Converter

Convert JSON arrays of objects to CSV (or back). Custom delimiter, type coercion, copy + download.

Base64 Encode / Decode

Encode text or files to Base64 (and back). UTF-8 safe + URL-safe variant supported.

URL Encoder / Decoder

Percent-encode and decode URLs and query parameters. Supports both component and full-URI modes.

Hash Calculator (MD5 / SHA-1 / SHA-256 / SHA-384 / SHA-512)

Compute cryptographic hashes of text or files in your browser. All five major algorithms, no upload.

UUID Generator (v4)

Generate cryptographically random UUIDs (v4) in bulk. Multiple format options, copy + clear.

Markdown ↔ HTML Converter

Convert Markdown to HTML (or back) with live preview. Supports CommonMark + GFM (tables, fenced code).

Image Format Converter (PNG / JPEG / WebP)

Convert images between PNG, JPEG, and WebP in your browser. Adjustable quality. No upload — fully private.

Validate International Bank Account Numbers via Mod-97 checksum. Country detection for 60+ nations.

Lorem Ipsum Generator

Generate placeholder text — paragraphs, sentences, words, or specific byte counts. With or without classic 'Lorem ipsum' opener.

Frequently Asked Questions

Are passwords generated here secure?

Yes. We use the browser's Web Crypto API (cryptographically secure RNG) for password generation. The password never leaves your browser, never gets logged, never gets transmitted.

Can I trust the hash calculator?

Yes — it uses the browser's built-in Web Crypto SubtleCrypto API for SHA-1, SHA-256, SHA-384, SHA-512. These are NIST-standard implementations identical to what OpenSSL uses server-side.

Will my pasted JSON / source code be uploaded anywhere?

No. All processing is client-side JavaScript. The data you paste never gets sent to any server, never gets logged, never gets stored.

Why use this instead of a CLI tool?

Convenience — no install, no environment setup, no version conflicts. For one-off conversions or quick verifications, a browser tool is faster than firing up Python, Node, or your favourite CLI suite.

Explore Other Categories

Browse 160 free, browser-based calculators across 9 more categories.

Islamic

Zakat, Mahr, Qurbani, Faraiz inheritance, Salah times, Qibla direction, Hijri calendar, and Sehri/Iftar — all in one place.

Financial

Make smarter money decisions with financial calculators.

Gold & Silver

Price, purity, weight, and karat calculators for precious-metal buyers, sellers, and jewellers.

Health

Monitor your wellness metrics with reliable health tools.

Unit

Instantly switch between any unit of measurement.

Date & Time

Plan ahead and track time with precision.

Math

Solve everyday math problems with dedicated calculators.

Construction

Essential tools for property, land, and building work.

Fun

Shareable, lighthearted tools for curiosity and entertainment.

Need something specific? Search all 160 tools →

Utility Calculators & Converters — 20 Free Tools | Smart Unit Converters