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This week

Mock Data from JSON Schema FREE
Generate realistic sample JSON that follows a JSON Schema, with a repeatable seed.
JSON, XML & YAML · Added
README Badge Generator FREE
Build shields.io badges for version, build, licence and downloads and copy them as Markdown or HTML.
Git Tools · Added
CVE Lookup FREE
Look up a CVE ID or search by product: severity, CISA KEV status, exploit probability, affected products and references.
Security & Crypto · Added
Bandwidth-Delay Product & TCP Throughput FREE
Calculate the TCP window you need and the real throughput given bandwidth, latency and packet loss.
Network Tools · Added
IP, ASN & BGP Prefix Lookup FREE
Find the holder, origin AS, announced prefix and BGP neighbours for an IP, prefix, AS number or hostname.
Network Tools · Added
GitHub Actions Workflow Generator FREE
Generate a GitHub Actions workflow for Node, Python, PHP, Go, Java, Rust, .NET, Docker or Pages.
Cloud & DevOps · Added
Semver Range Checker FREE
Test which versions satisfy an npm-style semantic version range.
Cloud & DevOps · Added
Magic Decoder FREE
Automatically detect and decode Base64, hex, URL encoding, gzip and more, layer by layer.
Encoders & Decoders · Added
security.txt Generator FREE
Create an RFC 9116 security.txt file so researchers know how to report vulnerabilities.
Security & Crypto · Added
UUID Inspector & v7 Generator FREE
Read the version and creation time inside a UUID, and generate sortable UUID v7 values.
Security & Crypto · Added
IOC Extractor & URL Defanger FREE
Pull IPs, domains, URLs, emails, hashes and CVEs out of text, and defang or refang links.
Security & Crypto · Added
SRI Hash Generator FREE
Create the integrity attribute and HTML tag for scripts and stylesheets loaded from a CDN.
Security & Crypto · Added
Hash Identifier & File Hash Calculator FREE
Find out which algorithm a hash came from, or checksum a file with MD5, SHA-1 and SHA-2.
Security & Crypto · Added
Wildcard Mask & ACL Generator FREE
Convert CIDR, subnet and wildcard masks and generate Cisco ACL lines.
Network Tools · Added
Time Zone Converter & Meeting Planner FREE
Convert a time between zones with daylight saving handled, and find a meeting hour for everyone.
Network Tools · Added
Well-Known Ports & Protocols FREE
Searchable list of common TCP and UDP ports and the services that use them.
Network Tools · Added
Code to Image FREE
Turn a code snippet into a styled PNG with themes, window frames and line numbers.
Image Tools · Added
.htaccess Generator FREE
Build an Apache .htaccess file for redirects, HTTPS, caching, compression and security, with Nginx rules.
Cloud & DevOps · Added
JavaScript Beautifier & Minifier FREE
Format minified JavaScript or compact it, with strings, templates and regex handled safely.
CSS & Frontend · Added
Certificate & CSR Decoder FREE
Decode an X.509 certificate or CSR: subject, issuer, validity, SANs, key and fingerprints.
Security & Crypto · Added
SSH Key Fingerprint FREE
Show the SHA256 and MD5 fingerprint, type and size of an SSH public key and compare it with another.
Security & Crypto · Added
CVSS Calculator FREE
Score vulnerabilities with CVSS 3.1: base, temporal and environmental scores and the vector string.
Security & Crypto · Added
HTTP Redirect Checker FREE
Follow a web address through every redirect and see status codes, loops and HTTPS upgrades.
Network Tools · Added
MAC Address Converter & Wake-on-LAN FREE
Convert MAC address formats, get the IPv6 link-local address and the Wake-on-LAN magic packet.
Network Tools · Added
Route Summarization Calculator FREE
Summarize IPv4 and IPv6 routes into the smallest list of prefixes or one summary route.
Network Tools · Added
CSP Builder & Evaluator FREE
Build a Content-Security-Policy and find weaknesses in an existing one.
Security & Crypto · Added
Password Breach Checker FREE
Check whether a password appears in known data breaches without sending it.
Security & Crypto · Added
JSON to CSV Converter FREE
Convert JSON to CSV with flattening, delimiters and Excel-friendly output.
JSON, XML & YAML · Added
JSON to Types Generator FREE
Generate TypeScript, Go, Java, C# or Python types from sample JSON.
JSON, XML & YAML · Added
Website Status FREE
Check if a website is online and see its hosting, WordPress detection, SSL, DNS, SEO and performance.
Network Tools · Added
Screenshot Beautifier FREE
Turn screenshots into polished images with device frames, gradients, shadows and text.
Image Tools · Added

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