Our top 20 most useful online tools, picked from 98 total tools. All processing is done in your browser — private and fast.
Format, validate, and beautify JSON data with syntax highlighting.
Encode text or files to Base64, or decode Base64 back to text.
Compress JPEG/PNG/WebP images up to 80% in your browser.
Test regular expressions against sample text with match highlighting.
Check DNS records: A, AAAA, MX, NS, CNAME, TXT, and SOA.
Generate UUID v4, v7, and other versions. Bulk generation supported.
Encode or decode URLs and query parameters.
Generate secure passwords with custom length and character sets.
Domain registration info: registrar, dates, name servers, DNSSEC.
Compare two texts side by side and highlight differences.
Generate QR codes from any text or URL. Download as PNG.
Pick colors, convert HEX/RGB/HSL, and copy color codes.
Convert HTML pages to clean, readable Markdown.
Convert Markdown to HTML with live preview.
Resize images to any dimensions with aspect ratio lock.
Design flexbox layouts visually with live preview.
Check server connectivity and response time on common ports.
Check if any TCP port is open or closed on a server.
Generate MD5, SHA-1, SHA-256, SHA-384, SHA-512 hashes.
Encrypt and decrypt text with AES-256-CBC using a password.