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Trending Tools
Color Picker & Converter
Pick and convert colors between HEX, RGB, HSL, HSV, CMYK, and OKLCH
Favicon Generator
Create favicons from images
Barcode Generator
Generate Code128, EAN13, and other linear barcodes with custom colors and dimensions
HEIC to JPG Converter
Convert HEIC photos to JPG format
Random Name Generator
Generate random human names by gender and locale; copy or download.
AVIF to JPG Converter
Convert AVIF images to JPG format online
Text Tools
Transform, analyze, and manipulate text
Case Converter
Convert text between uppercase, lowercase, title case, sentence case, camelCase, snake_case, and more
Word Counter
Count words, characters, sentences, paragraphs, and reading time with readability scores
Text Repeater
Repeat input text a set number of times with custom separators
Text Reverser
Reverse text characters, flip text upside down, or reverse word order with one click
Remove Line Breaks
Remove all line breaks from text while preserving other formatting and spacing
Remove Extra Spaces
Remove extra spaces and tabs from text to clean up formatting and improve readability
Image Tools
Convert, resize, and process images
PNG to JPG Converter
Convert PNG images to JPG with batch upload (20 files, 20 MB each) and per-file or convert-all queueing
JPG to PNG Converter
Convert JPG images to PNG with batch upload (20 files, 10 MB each) and per-file or convert-all queueing
AVIF to JPG Converter
Convert AVIF images to JPG format online
Favicon Generator
Create favicons from images
Image Converter
Convert images to and from JPG, PNG, WebP, AVIF, GIF, BMP, TIFF, ICO and SVG
HEIC to JPG Converter
Convert HEIC photos to JPG format
String & List Utilities
Manipulate lists, strings, and data structures
List Randomizer
Shuffle list items randomly with options to remove duplicates and empty lines
Count Lines
Count the number of lines in your text, including both total lines and non-empty lines
List to Comma Separated
Convert a column or newline list into a comma separated list (CSV) with custom delimiters, quote wrapping, and deduplication
Comma to List
Split a comma separated list (CSV) into a column of one item per line, with delimiter selection, quote stripping, deduplication, and sorting
Number List Generator
Generate sequential or random numbers with arithmetic/geometric sequences
Split Text
Split text into lines, words, or chunks by delimiter, regex, fixed length, or equal count with custom separators and quote wrapping
Encoding & Decoding
Encode, decode, and hash data securely
Base64 Encoder/Decoder
Encode and decode Base64 strings with support for images and files
HTML Entity Encoder
Encode HTML into entities using named or numeric references with decimal or hex.
HTML Entity Decoder
Decode HTML entities back to plain text characters instantly.
URL Encoder/Decoder
Encode and decode URL strings with percent-encoding. Auto conversion with option to escape all characters.
MD5 Hash Generator
Generate MD5 hashes from text for checksums, data verification, and file integrity checks
SHA1 Hash Generator
Generate SHA1 hashes from text for checksums, data verification, and file integrity checks
JSON & Data Tools
Format, convert, and validate data
JSON Formatter
Format, validate, and beautify JSON with syntax highlighting
JSON to YAML Converter
Convert JSON to YAML with instant transformation and export options.
YAML to JSON Converter
Convert YAML to JSON with instant transformation and syntax validation.
JSON to XML Converter
Convert JSON to XML with instant transformation, proper escaping, and export options.
XML to JSON Converter
Convert XML to JSON with instant transformation, attribute handling, and export options.
JSON to CSV Converter
Convert JSON data to CSV format with custom delimiters
Code & Developer Tools
Format, minify, and test code
Diff Checker
Compare two texts and highlight differences with side-by-side view, statistics, and export options
JavaScript Obfuscator
Obfuscate JavaScript code to protect intellectual property with advanced protection options
JavaScript Validator
Validate JavaScript code for syntax errors and common issues with real-time feedback
JavaScript Minifier
Minify JavaScript by removing comments and whitespace. Upload, copy, and download supported.
CSS Validator
Validate CSS code with W3C standards, check syntax errors, and ensure compliance with CSS profiles
CSS Minifier
Minify CSS by removing comments and unnecessary whitespace. Upload, copy, and download supported.
SEO & Marketing Tools
Optimize content for search engines
Meta Tag Generator
Generate HTML title, meta description, Open Graph, and Twitter Card tags with a live SERP preview
URL Slug Generator
Generate RFC 3986-compliant, SEO-friendly URL slugs from text lines
Open Graph Checker
Fetch a page and inspect its Open Graph and Twitter meta tags with live previews.
Page Title & Meta Description Length
Measure title and meta description character and pixel lengths with live Google SERP preview.
Robots.txt Generator
Generate a clean robots.txt file with user-agent, disallow/allow rules, crawl delay, and sitemap support.
Google SERP Simulator
Preview how your page appears on Google with editable title, description, URL, and site name. Toggle Desktop and Mobile views and fetch metadata from a URL.
Best Online All-In-One Toolbox
StackOnlineTools brings all essential utilities together into one fast, secure platform. If you're tired of bookmarking a different messy website for every tiny task, you're in the right place.
We've designed our platform to be beautifully simple and distraction-free. Our main aim is to help you perform complex operations — like string manipulation, data formatting, and SEO audits — in the minimum number of steps with a blazing fast UI.
Start using StackOnlineTools today and forget the cluttered, ad-filled alternatives forever.
Frequently Asked Questions
Everything you need to know about Stack Online Tools, from privacy to features.
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