buffer.lol
Fast, simple networking tools.
A focused toolbox for network diagnostics, web checks, and developer utilities—built to be quick, clear, and useful without getting in your way.
➜ ~ buffer ping example.com
Resolving host...
64 bytes from example.com: time=18.4 ms
64 bytes from example.com: time=17.9 ms
✓ 2 packets received · 0% loss
➜ ~
Everything you need.
Nothing you don't.
From quick network checks to everyday data transforms. Browser-ready tools run locally; network probes are clearly marked while their secure backend is being built.
Networking tools
Diagnose hosts, domains, routes, certificates, and the web layer.
Ping Tester
Check whether a host responds and inspect round-trip latency.
Packet Loss Tester
Sample connection stability and identify dropped packets.
Traceroute Visualizer
Follow the hops between this service and a destination.
DNS Lookup
Inspect A, AAAA, MX, TXT, CNAME, and NS records.
HTTP Header Inspector
See response headers, redirects, caching, and server details.
SSL Certificate Checker
Review certificate validity, issuer, names, and expiry.
Website Uptime Checker
Check reachability, response status, and timing on demand.
Port Checker
Test whether a public TCP port is reachable from the internet.
CIDR Calculator
Calculate IPv4 network ranges, masks, broadcast addresses, and host counts.
WHOIS Lookup
Look up domain registration, registrar, nameserver, and expiry details.
Redirect Checker
Follow redirects and inspect status codes, locations, and timing.
Robots.txt / Sitemap Checker
Inspect robots.txt rules and discover sitemap declarations for a website.
IP tools
Understand your public network identity and browser environment.
What's My IP
See the public IP address exposed by your connection.
IP Geolocation
Estimate the country, region, and network for a public IP.
ASN / ISP Lookup
Find the autonomous system and provider behind an IP.
User Agent Parser
Inspect this browser's user agent and platform signals.
Developer tools
Small, private utilities that run directly inside your browser.
JSON Formatter
Validate, format, and minify JSON without sending it anywhere.
Base64 Encoder / Decoder
Encode UTF-8 text to Base64 or decode it in your browser.
Hash Generator
Generate SHA-256, SHA-384, or SHA-512 digests locally.
UUID Generator
Create one or more RFC 4122 version 4 identifiers.
Timestamp Converter
Convert Unix timestamps and readable dates in either direction.
URL Parser / Encoder
Parse URLs, inspect query parameters, and encode or decode URL components locally.
JWT Decoder
Decode JWT headers and payloads locally without verifying signatures.
Regex Tester
Test JavaScript regular expressions and inspect matches, groups, and indexes.
Small tools. Clear results. No accounts, dashboards, or mystery.
Generate a UUID →