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DIEG DevTools — 70 Free Online Developer Tools & Utilities

Web utility tools. Fast, reliable and easy to use.

Website Hosting Checker: Who Hosts a Site, IP and Hoster

Check who hosts a website: the IP address, the hosting company (ASN), the country and the city of the server. Free hosting checker for any domain.

Password Generator and Checker: Like Chrome, or Easy to Type on a Phone

Password generator in your browser: random, in the style of Chrome, or easy to type on a phone, and a password checker. Nothing is sent.

Domain History Checker

Free domain history and expired domain checker: registration date and age, registrar and statuses from RDAP, Wayback Machine history and signs that the domain was dropped and registered again.

JPG & PNG to WebP Converter

Free WebP converter: convert JPG, PNG, GIF, BMP and ICO images to WebP online in your browser with the official libwebp encoder. Lossy, lossless and near-lossless, batch conversion, ZIP download, no upload.

Signature Generator Online: Make a Signature from Your Name

Free online signature generator: type your name, pick a handwritten style, watch it being written and download a transparent PNG. Or draw your own.

HTTP Status Code & Redirect Checker

Check the HTTP status code and response headers of any URL and follow the whole redirect chain (301, 302, 307, 308) step by step, with server IP and timings.

IP Lookup: IP Address Location and Reverse IP (DNS) Lookup

Free IP lookup: find the country, city, coordinates and timezone of an IP address and its host name with a reverse IP (reverse DNS) lookup. IPv4 and IPv6.

DNS Lookup: Check DNS Records and the SSL Certificate

Free DNS lookup online: check A, AAAA, CNAME, MX, NS, TXT, SOA and CAA records of any domain, plus its SSL certificate. Find out why a DNS lookup fails.

US Ping Test

Check from the United States (New York) whether a website is online: HTTP status code and response time in milliseconds. A free US ping test for any URL.

TTFB Checker: Test Time to First Byte Online

Free TTFB checker: measure the time to first byte of any website with DNS, connect, TLS and server wait times, from 1 to 5 runs and a median result.

Whois Lookup: Domain Whois and IP Whois (RDAP) Check Online

Free whois lookup: registrar, creation and expiry dates, status, DNSSEC and nameservers of a domain, or the network of an IP address. Uses RDAP and WHOIS.

Meta Tags and Hreflang Checker: Check Hreflang Errors

Read all meta tags of a page and check its hreflang: codes, self-reference, return links, x-default, status of alternate pages. With an hreflang tag generator.

View all 70 tools
 

Answers to common questions

Yes. All the tools are free, and you do not need an account. Open a tool, enter your data and get the result.

It depends on the tool. The password generator and the WebP converter work in your browser: the passwords and the images are not uploaded. Checkers such as the website hosting checker and the domain history checker have to ask other servers, so the domain or the IP address that you enter is processed on our server. Enter only public domains and addresses there, never passwords or private data.

Yes. The password generator creates passwords in your browser with the secure random numbers of the browser, so a password is never sent to a server. It makes a random password, a password in the style of Chrome and one that is easy to type on a phone. For an account that matters use 16 characters or more and keep the password in a password manager.

Open the WebP converter, drop your images into the box (or paste a screenshot with Ctrl+V), choose lossy for photos, lossless for graphics and screenshots, or near-lossless, and download each file or all of them as a ZIP archive. The conversion runs in your browser with the official libwebp encoder, so the images are not uploaded. According to Google, lossy WebP files are 25-34% smaller than JPG at the same visual quality.

Enter the domain in the website hosting checker. It shows the IP address, the network (ASN), the hosting company, the country and the city of the server. If the site works through a CDN such as Cloudflare, you see the CDN and not the server behind it.

Enter the domain in the domain history checker. It shows the registration date, the age, the registrar and the status of the domain from RDAP, the history of the site in the Wayback Machine and the signs that the domain expired and was registered again, for example archive captures older than the current registration.

Use the US ping test to see the status code and the response time from a server in the United States, or the HTTP status code and redirect checker to see the whole chain of redirects. A site can be open from one country and closed from another, so one failed check does not always mean that it is down for everybody.