Free Online Converters: Images, Data, Units & Encoding
Change a format while keeping the information you need. Pick an image converter for web assets, CSV and JSON tools for structured data, or unit converters for measurements.
Number Formatter
Format numbers with locale-aware separators, currency symbols, and compact notation
Markdown to JSON Converter
Convert Markdown tables, lists, and YAML front matter to JSON instantly in your browser. Free, no signup required.
ISBN Validator
Validate ISBN-10 and ISBN-13 barcodes, check the check digit, and convert between formats
Hex to Tailwind Color Finder
Find the nearest Tailwind CSS color for any hex color
Image Converter
Convert images between PNG, JPG, and WebP formats
Base64 Encoder/Decoder
Encode and decode text to Base64 format
URL Encoder/Decoder
Encode and decode URLs for safe transmission
HTML Encoder/Decoder
Encode and decode HTML entities for safe display
Timestamp Converter
Convert between Unix timestamps and human dates
Unit Converter
Convert between different units of measurement
URL Shortener
Turn long URLs into short, shareable links instantly
CSV/JSON Converter
Convert between CSV and JSON formats easily
QR Code Decoder
Scan and decode QR codes from images
JSON to TypeScript Converter
Convert JSON objects to TypeScript interface or type definitions
Markdown to HTML Converter
Convert Markdown text to HTML with live preview
Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal
Text Extractor (OCR)
Extract text from images using AI-powered OCR
YAML to JSON Converter
Convert YAML to JSON online — validate YAML syntax and get formatted JSON output instantly.
Roman Numeral Converter
Convert numbers to Roman numerals and Roman numerals back to numbers instantly
Scientific Notation Converter
Convert between decimal and scientific notation. Supports E notation and engineering notation.
JSON to CSV Converter
Convert JSON data to CSV format
XML to JSON Converter
Convert XML to JSON with attributes and repeated elements, directly in your browser.
JSON to YAML Converter
Convert JSON to YAML format online — paste JSON and get clean YAML output instantly.
Image to Base64 Converter
Convert images to Base64 encoded strings for HTML, CSS, and APIs
Base64 to Image Converter
Decode Base64 strings to images — preview, inspect metadata, and download
Image Compressor
Compress images without losing quality
Biorhythm Tracker
Track your medication cycle and energy levels
Epoch/Unix Timestamp Converter
Convert between epoch timestamps and dates
Cron To Human
Cron To Human - Free online tool
HTML Entity Converter
Encode and decode HTML entities instantly
Number to Words Converter
Convert any number to written English words instantly — supports decimals, negatives, and currency
Hex Text Converter
Convert text to hexadecimal and hex to text online. Supports Unicode characters, multiple separators, and uppercase or lowercase output. Free, instant, no signup.
Military Time Converter
Convert between 12-hour AM/PM and 24-hour military time format instantly — with quick reference chart
Binary to Text Converter
Convert binary code to readable text — or encode text into binary. Supports space-separated and continuous binary strings.
Amount in Words
Write money and numbers in words: checks, dollars, reais, cardinals and ordinals.
Choose by the task you need to finish
- Choose an output image format based on transparency, file size and browser support.
- Inspect a CSV delimiter and header row before converting records to JSON.
- Check the source and destination units before copying a converted measurement.