Free Online Tools

Free online tools for hashing, encoding, passwords, and web development. Calculate and verify checksums with MD5, SHA-1, SHA-2, SHA-3, and Keccak-256, generate strong passwords and password hashes, encode Base64, create UUIDs, and build CSS gradients and rounded corners.

Every tool runs locally in your browser. Your text, files, and passwords are not uploaded to a server, and the hash calculators remember only display settings, never your input.

Text, Hash & Data Tools

SHA-256 Hash Calculator

Popular

Calculate and verify SHA-256 hashes from text, files, Hex, or Base64 input, calculated locally in your browser.

SHA-224 Hash Calculator

Calculate and verify SHA-224 hashes from text, files, Hex, or Base64 input.

SHA-384 Hash Calculator

Calculate and verify SHA-384 hashes from text, files, Hex, or Base64 input.

SHA-512 Hash Calculator

Calculate and verify SHA-512 hashes from text, files, Hex, or Base64 input.

SHA-2 Hash Calculator

Calculate SHA-224, SHA-256, SHA-384 and SHA-512 hashes from the same text.

SHA-3 Hash Calculator

Generate SHA3-224, SHA3-256, SHA3-384 and SHA3-512 hashes from text.

Keccak-256 Hash Calculator

New

Calculate Keccak-256 hashes for Ethereum from text, files, Hex, or Base64 input.

SHA-1 Hash Calculator

Calculate and verify SHA-1 hashes from text, files, Hex, or Base64 input.

MD5 Hash Calculator

Calculate and verify MD5 hashes from text, files, Hex, or Base64 input.

HMAC Generator

Generate HMAC-SHA1, SHA256, SHA384 or SHA512 signatures using a secret key.

JWT Encoder and Decoder

New

Decode JSON Web Tokens, inspect claims, and generate or verify HMAC signatures locally.

Base64 Encoder and Decoder

Encode and decode Base64 text using this free online tool.

JSON Formatter and Validator

New

Pretty-print, validate and minify JSON, with clear syntax errors, locally in your browser.

URL Encoder and Decoder

New

Encode text for URLs or decode percent-encoded URLs and query parameters, locally in your browser.

Unix Timestamp Converter

New

Convert Unix timestamps to dates and dates to timestamps, in seconds or milliseconds, across time zones.

Hex to Text Converter

New

Convert text to hex and hex to text, with UTF-8, UTF-16 or Latin-1 and a hex dump.

UUID Generator Online

Generate UUID v1 and v4 identifiers online. Create and copy multiple UUIDs easily.

Web Design & Development

CSS Gradient Generator – Free Online Tool

Create custom CSS gradients with a live preview and copy-ready CSS code.

CSS Box Shadow Generator

New

Build CSS box shadows with sliders and layered shadows, then copy the CSS or a Tailwind class.

CSS Border Radius Generator

Generate CSS border-radius values with live previews and copy-ready CSS.

SVG to Base64 / CSS Converter

New

Turn SVG icons into Base64 or URL-encoded data URIs for CSS backgrounds, masks and HTML.

WCAG Color Contrast Checker

New

Check text and background colors against WCAG AA and AAA, and get the closest colors that pass.

Charts & Graphs

Bar Graph Maker

New

Paste numbers from Excel or Sheets and get a clean bar graph. Download PNG or SVG, or embed it.

Line Graph Maker

New

Paste numbers from Excel or Sheets and compare up to six lines. Download PNG or SVG, or embed it.

Security & Passwords

Password Generator – Create Strong Random Passwords

Generate random passwords with customizable length and character sets.

AES Encryption and Decryption

New

Encrypt and decrypt text or files with AES-256-GCM or CBC, using a password or a raw key, locally in your browser.

RSA Key Pair Generator

New

Generate RSA public and private keys in PEM or OpenSSH format, locally in your browser.

BIP39 Mnemonic Phrase Generator

New

Generate a 12 or 24-word BIP39 seed phrase, or check a phrase's checksum, locally in your browser.

Argon2id Hash Generator

Generate and verify Argon2id password hashes with configurable security parameters.

Bcrypt Hash Generator

Generate and verify bcrypt password hashes locally in your browser.

Scrypt Hash Generator

Generate and verify memory-hard scrypt password hashes locally in your browser.

Other tools:
Shopify Theme Detector: shopthemedetector.com
Essential Apps for Your Shopify Store: essential-apps.com