Free Online Converters
Convert between data formats, units, numbers, and encodings without uploading anything.
CSV to JSON
Convert CSV data to JSON arrays or objects with custom delimiters.
JSON to CSV
Convert JSON arrays to downloadable CSV files.
JSON ↔ YAML
Bi-directional conversion between JSON and YAML formats.
JSON to TypeScript
Auto-generate TypeScript interfaces from JSON data.
JSON to XML
Convert JSON objects to well-formatted XML documents.
Markdown to HTML
Convert Markdown to clean, semantic HTML code.
HTML to Markdown
Convert HTML to Markdown for documentation and READMEs.
HTML Entity Encoder
Encode and decode HTML entities like &, <, and special characters.
URL Encoder/Decoder
Encode and decode URLs and query strings.
Base64 Encoder
Encode and decode Base64 strings for data transfer.
Image to Base64
Convert images to Base64 data URIs for embedding in HTML and CSS.
Base64 Image Decoder
Decode Base64 strings back to images and download them.
Image Converter
Convert images between PNG, JPEG, WebP, AVIF, and GIF formats.
SVG to PNG
Rasterize SVG files to PNG at any resolution up to 4x.
Unit Converter
Convert length, weight, temperature, speed, area, volume, and data units.
Number Base Converter
Convert between binary, octal, decimal, and hexadecimal.
Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa.
PX to REM
Convert between pixel and rem units with custom base font size.
Binary ↔ Text
Convert text to binary and binary to text.
Morse Code Translator
Convert text to Morse code and back with audio playback.
Roman Numeral Converter
Convert between Roman numerals and Arabic numbers.
Number to Words
Convert numbers to written words in English.
About Our Converters
Absolutool includes 22 converter tools spanning data formats, markup languages, encodings, units, and number systems. Convert between JSON, CSV, YAML, XML, TypeScript, Markdown, and HTML without uploading files · everything processes in your browser.
Developers love our Base64 and URL encoders for quick transformations. Designers use the image converter and SVG-to-PNG tool. Students and professionals rely on the unit converter (7 categories), number base converter, timestamp tool, and Roman numeral translator for everyday conversions. No sign-up, no limits.