All tools

Every Zase tool in one place, grouped by category. Each one runs entirely in your browser: open a tool and start working, with nothing to install and nothing to upload.

Data

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JSON Formatter Format, validate, minify, sort, tree view and convert JSON. Number Base Converter Convert integers between binary, octal, decimal, hex and more. SQL Formatter Format SQL with clause breaks and keyword casing. JSON to Types Turn a JSON sample into TypeScript, Go or Python types. CSS Formatter & Minifier Format CSS with clean indentation, or minify it for production. User Agent Parser Paste a user agent string and see the browser, OS and device inside it. YAML Formatter & Converter Format and validate YAML, or convert between YAML and JSON. XML Formatter & Validator Format and validate XML, or minify it for production. JSONPath Tester Query a JSON document with a JSONPath expression and see every match.

Security

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JWT Decoder Decode JWT header and payload locally. Hash Generator MD5, SHA-1, SHA-2 hashes + HMAC, for text and files. JWT Signer Sign JSON Web Tokens locally (HS256, HS384, HS512). AES Encrypt / Decrypt Encrypt text with a password (AES-256-GCM), decrypt it back.

Encoding

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Base64 Encode and decode Base64 (UTF-8 safe). URL Encoder Encode or decode URLs. Edit query params in the breakdown. HTML Entity Encoder & Decoder Encode text to HTML entities, or decode entities back to text.

Generators

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UUID & ID Generator Generate UUID v4/v7, ULID and Nano ID values. Validate any ID. Password Generator Strong crypto-random passwords, passphrases and PINs. QR Code Generator Turn text or a link into a QR code. Fully offline. Favicon Generator Make a full favicon set (PNG sizes plus favicon.ico) from an image or text.

Conversion

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Timestamp Converter Convert Unix time ↔ readable dates. Case Converter UPPER, lower, Title, camel, snake, kebab and more. Image Compressor Compress, resize and convert images. PNG, JPEG, WebP.

Color

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Color Tools Convert HEX, RGB, HSL, OKLCH. Contrast checker and shades. CSS Gradient Generator Design linear and radial gradients and copy the CSS.

Text

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Text Utilities Counts, sort lines, dedupe, trim whitespace. Diff Checker Compare two texts line by line, with word-level highlights. Lorem Ipsum Generate placeholder text in Latin or custom words. Markdown Preview Write Markdown, see the rendered result, copy the HTML. Meta Tag Generator SEO, Open Graph and Twitter meta tags, generated live. Slug Generator Turn titles and headings into clean, URL friendly slugs.

Regex

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Regex Tester Test patterns with flags, groups, highlighting and replace.

Reference

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HTTP Status Codes Searchable reference for all HTTP status codes. Cron Parser Parse cron expressions into human-readable form. Builder included. chmod Calculator Build Unix permissions: checkboxes, octal and symbolic views. IP Subnet Calculator Network, broadcast, mask and host ranges for any IPv4 subnet.