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How-to Guides: Free Online Tools
Step-by-step tutorials for 60+ free online tools. Learn how to use each tool with screenshots, use cases, and FAQ.
Encryption & Hashing
Formatters
Converters
How to Use Base64 Encode/Decode
Base64 string encoding and decoding
How to Use Base32 Encode
Base32 encoding and decoding
How to Use Base58 Encode
Base58 encoding and decoding
How to Use Radix Converter
Multi-base number conversion
How to Use CSV/JSON Converter
Convert between CSV and JSON
How to Use URL Encode/Decode
URL encoding and decoding
How to Use Image to Base64
Convert images to/from Base64
How to Use PNG to SVG
Image format conversion
How to Use Byte Converter
Convert between bytes, KB, MB, GB, TB, PB
How to Use Sum Numbers
Calculate sum of numbers in text
How to Use CSV to JSON Converter
Convert CSV data to JSON format
How to Use JSON to CSV Converter
Convert JSON data to CSV format
How to Use CSV to XML Converter
Convert CSV data to XML format
How to Use CSV to YAML Converter
Convert CSV data to YAML format
How to Use TSV to JSON Converter
Convert TSV (Tab-Separated Values) to JSON
How to Use Transpose CSV
Swap rows and columns in CSV data
How to Use JSON to XML Converter
Convert JSON data to XML format
How to Use PDF Tools
Merge, split, compress, convert PDF files online
Developer Tools
How to Use Cron Expression
Cron job expression builder
How to Use Regex Tester
Test regular expressions online
How to Use Regex Visualizer
Visual regex editor & AST viewer
How to Use Mermaid Chart
Online flowchart diagrams
How to Use SVG Editor
Online SVG editor
How to Use Keyboard Test
Online keyboard key tester
How to Use File Viewer
Preview 135+ file formats — PDF, Word, Excel, CAD, 3D, images & more
How to Use HTML Visual Editor
Upload or paste HTML, then edit visually with live preview. 100% browser-based, no upload.
How to Use Cron Expression Parser
Parse and explain cron expressions
How to Use Escape JSON
Escape special characters in JSON strings
How to Use Sort JSON Keys
Sort keys in JSON objects alphabetically
How to Use Stringify JSON
Convert JavaScript objects to JSON string
How to Use Find Incomplete CSV Records
Find rows with missing columns or empty values in CSV
How to Use Insert CSV Column
Insert a new column into CSV data
How to Use Swap CSV Columns
Swap two columns in CSV data
How to Use CSV Rows to Columns
Convert CSV rows to columns (transpose)
How to Use Group Lines
Group list items into chunks
How to Use Text Compare
Compare two texts and show differences
How to Use Arithmetic Sequence Generator
Generate arithmetic sequence
How to Use Random Number Generator
Generate random numbers in a range
How to Use Password Generator
Generate secure passwords
How to Use Text Replacer
Find and replace text
How to Use Morse Code Converter
Convert text to Morse code or Morse code to text
How to Use Extract Substring
Extract a substring from text by index
How to Use Hidden Character Detector
Detect hidden characters in text
Generators
How to Use QR Code Generator
Custom styled QR code generator
How to Use Lorem Ipsum
Random text generator
How to Use Random String
Generate random strings
How to Use Random Group
Split list into random groups
How to Use UUID Generator
Generate UUID/GUID
How to Use Pixel Art Generator
Convert images to pixel style
How to Use Text to Speech
Online TTS conversion
How to Use Handwriting Animation Generator
Convert text into beautiful handwriting animations, free online tool
Text Tools
How to Use Text Translator
Translate between 30+ languages instantly
How to Use Case Converter
Convert between naming conventions
How to Use Text Formatter
Text processing and formatting
How to Use Text Diff
Compare two texts for differences
How to Use Unicode Tool
Unicode character utilities
How to Use Reverse Text
Reverse text or each line independently
How to Use Text Statistics
Analyze text statistics: characters, words, lines, sentences
How to Use Slug Generator
Generate URL-friendly slugs from text
How to Use ROT13 Cipher
Apply ROT13 substitution cipher
How to Use Randomize Case
Randomly capitalize letters in text
How to Use Quote Text
Add quotation marks to text lines
How to Use Text Censor
Censor sensitive words in text
How to Use Palindrome Checker
Check if words are palindromes
How to Use Remove Duplicate Lines
Remove duplicate lines from text with multiple modes
How to Use Rotate Text
Rotate characters in text by N positions
How to Use Split Text
Split text by separator, regex, length, or chunks
How to Use Join Lines
Join multiple lines into one with a separator
How to Use Repeat Text
Repeat text N times with a delimiter
How to Use Shuffle Lines
Randomize the order of lines in text
How to Use Sort Lines
Sort lines alphabetically, numerically, or by length
How to Use Find Unique Lines
Extract lines that appear exactly once
How to Use Duplicate Lines
Duplicate lines in text N times
How to Use Find Most Popular Items
Count and rank items in a list
How to Use Reverse Lines
Reverse the order of lines in text
How to Use Rotate Lines
Rotate lines in text (move first N lines to end)
How to Use Wrap / Unwrap Lines
Wrap long lines or unwrap short lines
How to Use Truncate Lines
Keep or remove first N lines
How to Use Unwrap Lines
Join lines with separator
How to Use Reverse Lines
Reverse the order of lines
How to Use Shuffle Lines
Randomly shuffle lines
How to Use Sort Lines
Sort lines alphabetically
How to Use Duplicate Lines
Duplicate lines multiple times
How to Use Remove Duplicates
Remove duplicate lines
How to Use Wrap Text
Wrap text to specified line length
How to Use Unwrap Text
Join lines into a single line
How to Use Truncate Lines
Keep only first N lines
How to Use Rotate Lines
Rotate lines by N positions
How to Use Uppercase Text
Convert text to uppercase
How to Use Randomize Case
Randomly change text case
How to Use Remove Duplicate Lines
Remove duplicate lines from text
How to Use Truncate Text
Truncate text to specified length
How to Use Quote Text
Add quotes to text
How to Use Check Palindrome
Check if text is a palindrome
JSON Tools
Time Tools
How to Use Check Leap Years
Check if years are leap years
How to Use Convert Days to Hours
Convert days to hours
How to Use Convert Hours to Days
Convert hours to days
How to Use Convert Seconds to Time
Convert seconds to time format (HH:MM:SS)
How to Use Convert Time to Seconds
Convert time format (HH:MM:SS) to seconds
How to Use Convert Time to Decimal
Convert time format (HH:MM:SS) to decimal hours
How to Use Unix Timestamp Converter
Convert Unix timestamp to date and vice versa
How to Use Crontab Guru
Explain cron expressions in plain English
How to Use Truncate Clock Time
Truncate time to hour, minute, or second
Network Tools
Image
How to Use Image Resizer
Resize images by width, height, or fit mode
How to Use Image Cropper
Crop images to exact pixel coordinates
How to Use Change Image Opacity
Adjust image opacity (solid or gradient mode)
How to Use Create Transparent PNG
Make specific colors transparent in an image
How to Use Split Image
Split an image into multiple tiles
How to Use Image Compressor
Compress images with quality control
How to Use AI Watermark Remover
Remove Gemini AI image watermarks in browser
How to Use Media Downloader
Download videos from Bilibili, Douyin, TikTok, Instagram
How to Use Image Converter
Convert between JPEG, PNG, WebP, AVIF, TIFF
How to Use Image Rotator
Rotate images by any angle
How to Use Color Palette
Extract dominant colors from any image
How to Use Favicon Generator
Generate favicon from any image
How to Use Strip Metadata
Remove EXIF and metadata from images
How to Use Image Info
Read dimensions, format, and metadata
How to Use Image Border
Add colored borders to images
How to Use Watermark
Add text watermarks to images
How to Use Color Adjust
Adjust brightness, contrast, saturation
How to Use AI ID Photo Maker
Free AI-powered ID photo generator with background removal & size adjustment
How to Use AI Background Remover
Free AI-powered background remover — remove image backgrounds instantly in your browser
How to Use Passport Photo
Generate passport and visa photos
How to Use Meme Generator
Add top and bottom text to any image
How to Use Beautify Screenshots
Add padding, shadow, and borders to screenshots
How to Use Find Duplicates
Compare images and detect duplicates with perceptual hashing
How to Use Create GIF
Create animated GIFs from multiple image frames
Utilities
How to Use Coin Flip
Random coin flip simulator
How to Use Counter
Simple counter tool
How to Use Countdown
Custom countdown timer
How to Use Stopwatch
Online stopwatch tool
How to Use Pomodoro Timer
Pomodoro technique timer
How to Use Spin Wheel
Random spin wheel tool
How to Use Scoreboard
Real-time score tracker
How to Use Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates
How to Use Discord Timestamp Generator
Generate Discord timestamp strings from dates
How to Use Seconds to Time Converter
Convert seconds to HH:MM:SS time format
How to Use Time Between Dates Calculator
Calculate duration between two dates
How to Use Leap Year Checker
Check if years are leap years
How to Use Days to Hours Converter
Convert days to hours
How to Use Hours to Days Converter
Convert hours to days
How to Use Time to Seconds Converter
Convert HH:MM:SS to seconds
How to Use Truncate Clock Time
Truncate time to hours only or hours+minutes
How to Use Time to Decimal Converter
Convert HH:MM:SS to decimal hours
How to Use XML Beautifier
Format and validate XML
How to Use XML Validator
Validate XML format