SSL certificate checker
Check if a website's security certificate is valid and when it expires. See who issued it and what domains it covers.
Check SSL
Utilities
PD NetTools
Free infrastructure and security utilities. No ads, no accounts—just tools that work.
CSR & key generator
Create the files your certificate authority needs to issue your SSL certificate. Quick and secure, right in your browser.
Generate CSRCRT → PFX converter
Combine your SSL files into one package for Windows servers and apps that need a single .pfx file.
ConvertOCSP / revocation test
See if a certificate has been revoked or has trust issues. Useful for debugging SSL problems.
Test OCSPData breach check
Check if your email or password appeared in any known data breaches. Uses the Have I Been Pwned database.
Check nowWHOIS lookup
Find out who owns a domain, when it was registered, and when it expires. Works with most domain types.
LookupSpeed test
Test your internet download and upload speed. Measures from our servers in the region.
Run testTTFB / latency compare
Measure how fast a website responds. Compare two sites side by side to see which loads faster.
CompareQR code generator
Create QR codes for links, text, or WiFi passwords. Add your logo, pick colors, and download in any size.
Create QRColor converter
Convert colors between HEX, RGB, HSL, and CMYK. Pick with sliders or type values directly.
ConvertFavicon generator
Upload an image, get favicons in all the sizes you need. Download as PNG, ICO, or a ready-to-use ZIP.
GenerateMarkdown converter
Turn Markdown into styled HTML or a Word document. See a live preview as you type.
ConvertText diff
Compare two texts to see what changed. Highlights additions, deletions, and edits side by side.
CompareCRT quote generator
Create retro terminal-style images for social media. Export as PNG or animated GIF with typing effect.
Create