All online tools
Search practical developer, image, PDF, encoding, and productivity utilities. Each tool explains its inputs, outputs, limits, and processing method.
JSON Formatter
JSON Utilities
Format and beautify unformatted JSON strings into structured, indented code.
JSON Validator
JSON Utilities
Validate JSON syntax and identify exact error positions with detailed diagnostic messages.
JSON Minifier
JSON Utilities
Compress JSON code by removing all whitespace, indentations, and newlines.
JSON Viewer
JSON Utilities
Inspect complex JSON data structures with collapsible tree nodes and data type badges.
Base64 Encoder
Encoding & Decoding
Encode text strings and binary data into standard Base64 string format.
Base64 Decoder
Encoding & Decoding
Decode Base64 encoded strings back to human-readable UTF-8 text.
URL Encoder
Encoding & Decoding
Encode text characters into percent-encoded URL string component formats.
URL Decoder
Encoding & Decoding
Decode percent-encoded URL strings back into human-readable characters.
UUID Generator
Generators
Generate cryptographically secure v4 and v1 Universally Unique Identifiers (UUIDs).
Unix Timestamp Converter
Date & Time
Convert Unix epoch timestamps to human-readable dates and vice versa.
Regex Tester
Regex Tools
Test and debug JavaScript regular expressions with real-time match highlighting.
Color Converter (HEX / RGB / HSL)
Color Tools
Convert color codes between HEX, RGB, HSL formats with interactive color picker.
HTML Formatter
HTML Utilities
Format, clean, and beautify raw HTML markup with consistent indentation.
CSS Formatter
CSS Utilities
Format and beautify CSS stylesheets with clean rule indentation.
Markdown Editor & Previewer
Markdown
Write and edit Markdown with live dual-pane HTML rendering preview.
Image Compressor
Image Tools
Reduce JPEG, PNG, and WebP file sizes with a visual quality control and instant savings report.
Image Converter
Image Tools
Convert JPG, PNG, and WebP images between modern browser-friendly formats in seconds.
Image Resizer
Image Tools
Resize images to exact pixel dimensions while preserving aspect ratio and export quality.
Merge & Reorder PDF
PDF Tools
Combine multiple PDF files in your chosen order and download one finished document.
Split & Extract PDF Pages
PDF Tools
Extract selected pages or page ranges into a new PDF document.
PDF Compressor
PDF Tools
Reduce image-heavy PDF file sizes with selectable compression strength.
Images to PDF
PDF Tools
Combine JPG, PNG, and WebP images into a clean, ordered PDF document.
PDF to Images
PDF Tools
Convert PDF pages into high-quality PNG or JPEG images and download them as a ZIP.
Organize & Rotate PDF Pages
PDF Tools
Reorder, remove, duplicate, and rotate PDF pages using a simple page sequence.
CSV to JSON Converter
Data Converters
Convert CSV rows into structured JSON arrays directly in your browser.
JSON to CSV Converter
Data Converters
Convert an array of flat JSON objects into downloadable CSV text.
Markdown to HTML
Markdown Tools
Convert common Markdown syntax into clean HTML markup.
HTML to Markdown
Data Converters
Convert common HTML elements into readable Markdown text.
Word Counter
Text Tools
Count words, characters, lines, sentences, and estimated reading time.
Character Counter
Text Tools
Count characters with and without spaces plus words and lines.
Case Converter
Text Tools
Generate uppercase, lowercase, title case, sentence case, camelCase, and snake_case versions.
Text Cleaner
Text Tools
Normalize whitespace, trim lines, and remove repeated blank lines.
Remove Duplicate Lines
Text Tools
Remove repeated lines while preserving the first occurrence and original order.
Text Line Sorter
Text Tools
Sort non-empty text lines alphabetically with natural numeric ordering.
URL Slug Generator
Text Tools
Turn titles and phrases into lowercase, hyphen-separated URL slugs.
Decimal to Binary Converter
Data Converters
Convert safe decimal integers into binary notation.
Binary to Decimal Converter
Data Converters
Convert base-2 binary integers into decimal values.
Percentage Calculator
Calculators
Calculate what percentage one number is of another using simple comma-separated input.
Discount Calculator
Calculators
Calculate sale price and savings from an original price and discount percentage.
Markup Calculator
Calculators
Calculate selling price and gross profit from cost and markup percentage.
Age Calculator
Calculators
Calculate age in completed years, months, and days from a birth date.
JWT Decoder
Security & Identity Tools
Decode JWT header and payload data without claiming to verify its signature.
Password Generator
Security & Identity Tools
Generate strong random passwords locally with browser cryptographic randomness.
XML Formatter
Data Converters
Pretty-print XML markup with readable indentation and syntax validation.