Remove unwanted characters, lines, and whitespace.
Switch between uppercase, lowercase, title case, and more.
Sort, reverse, shuffle, and manipulate lines.
Search and replace text, extract emails, URLs, numbers.
Count words, characters, lines, sentences, and analyze text.
Reverse, repeat, and stylize text.
Encode and decode text — Base64, URL, HTML entities, hashes.
Generate Lorem Ipsum, passwords, random numbers, slugs, and more.
JSON formatter, JWT decoder, HTML editor, CSV ↔ JSON, diff, Markdown.
Age, BMI, loan, percentage calculators and unit converters — all in your browser.
Resize, compress, crop, convert, and transform images — all in your browser.
Merge, split, rotate, and convert PDFs — all in your browser, no upload.
Filter, sort, dedupe, and analyze CSV data — all in your browser.
Word, Excel, and PowerPoint conversions — DOCX, XLSX, PPTX — all in your browser.
Generate iOS / Android / Play Store icons, wallpapers, screenshots, and social-share images from one source image.
Trim, fade, normalize audio files entirely in your browser via the Web Audio API.
Compress, trim, mute, convert, and stamp watermark on video files entirely in your browser.
Convert between units of length, area, volume, weight, speed, and more — instant results in your browser.
DNS lookup, WHOIS, ping, HTTP headers, SSL checker, and IP tools.
Concrete, brick, paint, roofing, lumber, and flooring calculators for builders and contractors.
Calculate Ohm's law, electricity cost, single and three phase power, and battery run time.
Statistical analyzer, frequency distribution, editable data tables — data exploration in your browser.
Instagram profile downloader, social media link analyzer, and media URL extractor tools.
Test, debug, and document APIs
SQL formatting, schema design, and query tools
Docker, Kubernetes, CI/CD, and infrastructure tools
WCAG compliance, contrast checking, and ARIA tools
CSP, security headers, and privacy compliance tools
Convert, format, and generate Markdown content
Test, debug, visualize, and generate regular expressions
MIME Type Lookup — Type a file extension (or filename) and get the proper Content-Type header value. Reverse lookup too — type a MIME type ...
MIME Type Checker — Enter a file extension or MIME type to look up the corresponding type. Supports 160+ common file formats including web, office, medi...
Free online file MIME type checker. Upload any file to detect its MIME type, file extension, description, and size.
Most shortcuts ignore when you're typing in a text field.