Premium Converters

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.

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 159 free, browser-based calculators across 9 more categories.

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

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Monitor your wellness metrics with reliable health tools.

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Instantly switch between any unit of measurement.

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Plan ahead and track time with precision.

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Need something specific? Search all 159 tools →

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Premium Converters

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Utility Calculators & Converters

Handy utilities for developers, writers, and everyday use.

20 tools

Most Used

Most Popular in Utility

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

4 picks

Base Converter

Convert integers between binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16) — built for programmers debugging memory addresses, bitmasks, and hex colors.

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Password Generator

Generate cryptographically secure random passwords (6 to 64 chars) using the browser's Web Crypto API, with strength meter and optional uppercase, digits, and symbol character sets.

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QR Code Generator

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

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Image Format Converter (PNG / JPEG / WebP)

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

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All Utility Tools

Browse all 20 calculators

Base Converter

Convert integers between binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16) — built for programmers debugging memory addresses, bitmasks, and hex colors.

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Unix Timestamp Converter

Translate Unix epoch timestamps (seconds or milliseconds since Jan 1 1970 UTC) to readable ISO, UTC, and local-timezone dates — auto-detects format and handles the Y2038 problem.

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Color Converter

Translate colors between HEX, RGB, and HSL with a live swatch preview — built for CSS work, brand palette design, and converting Tailwind shades between formats.

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Word Counter

Live word, character, sentence, and paragraph counter with reading and speaking time estimates — ideal for essays, blog SEO, tweets within 280 chars, and timed speeches.

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Case Converter

Instantly convert text between UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case, and kebab-case — ideal for variable renaming, URL slugs, and headings.

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Password Generator

Generate cryptographically secure random passwords (6 to 64 chars) using the browser's Web Crypto API, with strength meter and optional uppercase, digits, and symbol character sets.

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Text Reverser / Palindrome Checker

Reverse any text character-by-character or word-by-word, plus check classic palindromes like "A man, a plan, a canal: Panama" while ignoring spaces, punctuation, and case.

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QR Code Generator

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

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Barcode Generator

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

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Regex Tester

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

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JSON ↔ YAML Converter

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

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JSON ↔ CSV Converter

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

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Base64 Encode / Decode

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

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URL Encoder / Decoder

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

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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.

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UUID Generator (v4)

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

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Markdown ↔ HTML Converter

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

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Image Format Converter (PNG / JPEG / WebP)

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

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IBAN Validator

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

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Lorem Ipsum Generator

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

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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.

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.