iziznkit

All tools

Every calculator and document generator on iznkit, grouped by what you're doing. All free to use, right in your browser — no sign-up.

Documents

Real estate

Freelance & taxes

Marketing & SEO

E-commerce

Developer tools

JSON formatterPopular

Format, validate and minify JSON in your browser.

Base64 encoder / decoder

Encode or decode Base64 text, UTF-8 safe.

JWT decoder

Decode a JWT's header and payload in your browser.

Regex tester

Test regular expressions with live match highlighting.

URL encoder / decoder

Percent-encode or decode URLs and query strings.

UUID generator

Generate random UUID v4 identifiers in bulk.

Hash generator (SHA)

SHA-1, SHA-256, SHA-384 and SHA-512 of any text.

Unix timestamp converter

Convert Unix timestamps to dates and back.

Color converter

Convert colors between HEX, RGB and HSL.

Text diff / compare

Compare two texts and highlight what changed, line by line.

Cron expression parser

Explain a cron schedule in plain English and see the next run times.

Case converter

UPPERCASE, lowercase, Title, camelCase, snake_case and more.

Lorem ipsum generator

Placeholder text — paragraphs, sentences or words.

CSS gradient generator

Build a gradient and copy the CSS.

JSON to CSV converter

Convert JSON to CSV and CSV to JSON in your browser.

JSON to TypeScript & Go

Generate TypeScript interfaces or Go structs from JSON.

YAML ↔ JSON converter

Convert YAML to JSON and JSON to YAML in your browser.

Markdown to HTML preview

Write Markdown, see the HTML preview and copy the source.

Image to Base64

Turn an image into a Base64 data URI — in your browser.

SQL formatter & beautifier

Format and beautify SQL for 10+ dialects — in your browser.

Image to WebP converter & compressor

Convert images to WebP, JPEG or PNG and shrink the file — in your browser.

chmod calculator

Build Unix file permissions — octal, symbolic and a ready chmod command.

XML formatter

Beautify or minify XML and catch parse errors in your browser.

Minify & beautify (HTML/CSS/JS)

Beautify or minify HTML, CSS and JavaScript — locally, with size stats.

Cron expression builder

Build a cron schedule from presets or fields, with a plain-language summary.

Color palette & shades generator

Generate tints, shades and color harmonies from any base color.

Utilities

Everyday calculators