PureKitFree online toolkit · No upload · Works offline · Privacy first

Combine multiple images into one, vertically or horizontally — ideal for ID card front & back

Exact age from date of birth: years/months/days, total days lived, and next-birthday countdown

Final price and savings from a discount, or the discount rate from two prices

Convert text case: UPPER, lower, Title, Sentence, camelCase, snake_case, kebab-case and more

Remove duplicate lines, empty lines, trim spaces, sort or join lines — clean lists in one click

Convert CSV to JSON and JSON to CSV with delimiter detection and type inference — files stay local

Format, minify, and validate JSON data

Convert between Unix timestamps and readable dates with timezone support

Real-time regex matching with capture groups and preset patterns

Format, minify, and beautify SQL queries with multiple dialect support

Visual Linux/Unix file permission calculator, convert between octal and symbolic notation

Format, minify, validate YAML, and convert between YAML and JSON

Convert between binary, octal, decimal, hexadecimal, and ASCII

Decode and inspect JSON Web Tokens, view Header, Payload and expiration

Look up HTTP status code meanings with search and category filtering

Parse URL components: protocol, host, path, query params, hash

Parse cron expressions with human-readable descriptions and next execution times

Compare two texts side by side with highlighted differences

Days between two dates, or add/subtract days from a date

Percentage increase, decrease, of a number, and difference calculators

Convert length, weight, temperature, area, volume, and speed units

Exact age from date of birth: years/months/days, total days lived, and next-birthday countdown

Final price and savings from a discount, or the discount rate from two prices

Convert CSV to JSON and JSON to CSV with delimiter detection and type inference — files stay local

Generate QR codes from text/URL with custom size, color, and error correction

Generate secure passwords with custom length, charset, and entropy display

Convert between HEX, RGB, HSL with color picker and contrast checker

Batch generate UUID v4 with format options: uppercase, hyphens, braces

Generate random API keys with custom prefix, length, and charset

Generate placeholder text in Chinese and English, paragraphs, sentences, or words

Random numbers, pick from a list, and split into random teams

Encode/decode text and files to Base64 with URL-safe mode

Encode/decode URLs, parse query params, convert Query ↔ JSON

Compute MD5/SHA-1/SHA-256/SHA-512 hashes for text and files

Live Markdown preview + PDF export with GFM support

Count words, characters, and lines for Chinese and English text

Convert text case: UPPER, lower, Title, Sentence, camelCase, snake_case, kebab-case and more

Remove duplicate lines, empty lines, trim spaces, sort or join lines — clean lists in one click

Merge multiple PDF files into one

Extract specific pages from a PDF

Combine multiple images into a single PDF

Convert images between PNG, JPEG and WebP with quality and size controls

Clean and optimize SVG code by removing redundant attributes and comments

Compress images in the browser to reduce file size

Resize images to social media platform presets

Combine multiple images into one, vertically or horizontally — ideal for ID card front & back