curlhub.sh
curl curlhub.sh

curl-native developer tools

Developer tools
you already
curl.

UUIDs, hashes, JWTs, CIDR math, SSL and WHOIS lookups, pastes and throwaway webhooks — each one is just a URL. Run it with the curl you already have — clean text in your shell, a real documented page in your browser.

Browse the tools See it in a terminal
curl curlhub.sh/uuid

copy · run · done — no signup, no install, nothing to keep

the toolbox

Two dozen small, sharp tools.

Each does one thing well and returns exactly what you'd want to see in a terminal. Here's the whole set — browse them all →

Generate & transform

/uuid
RFC-4122 v4 UUIDs, one per line.
curl curlhub.sh/uuid
/pass
CSPRNG passwords with tunable length & charset.
curl curlhub.sh/pass?len=32
/hash
md5, sha1, sha256 & sha512 at once.
curl curlhub.sh/hash?data=hello
/b64
base64 encode / decode, binary-safe.
curl curlhub.sh/b64?data=hi
/json
Validate and pretty-print JSON.
curl --data-binary @d.json curlhub.sh/json
/jwt
Decode a JWT — header, payload, timing.
curl curlhub.sh/jwt?data=<token>
/qr
Scannable QR codes as terminal blocks.
curl curlhub.sh/qr?data=hi
/md
Render Markdown to a readable terminal doc.
curl --data-binary @README.md curlhub.sh/md

Inspect & look up

/ssl
Parse a PEM cert or CSR — subject, SANs, expiry.
curl --data-binary @cert.pem curlhub.sh/ssl
/whois
RDAP domain lookup — registrar, dates, NS.
curl curlhub.sh/whois/example.com
/cidr
Subnet math — network, broadcast, host range.
curl curlhub.sh/cidr/10.0.0.0/24
/cron
Explain a cron expression + its next runs.
curl curlhub.sh/cron?expr=*/5+*+*+*+*
/status
Explain any HTTP status code, plainly.
curl curlhub.sh/status/418
/headers
Echo the request headers you sent — secrets redacted.
curl curlhub.sh/headers
/ua
Parse a User-Agent into browser / OS / engine.
curl curlhub.sh/ua
/ip
Your public IP, and nothing else.
curl curlhub.sh/ip

Ephemeral https only

/p
Pipe text in, get a short URL back.
curl --data-binary @log.txt curlhub.sh/p
/u
One-time file drop — a single download, then gone.
curl --data-binary @file curlhub.sh/u
/hook
A throwaway endpoint that records what hits it.
curl curlhub.sh/hook/new

Reference

/man
The community-kept man-page wiki + recipes.
curl curlhub.sh/man/curl

how it's built

Boring on purpose. Careful where it counts.

A tool you reach for daily should be predictable, private, and honest about its trade-offs.

01 Same URL, two audiences

Hit a tool with curl and you get terminal-ready text and ANSI. Open the same URL in a browser and you get a documented page with runnable examples. No ?format gymnastics.

02 Quiet by default

No accounts, no ad networks, and no profile built from your requests — the pure tools don't keep what you send them. The stateful ones — pastes, file drops, webhooks — hold data only until they expire. (Infrastructure and Cloudflare log request IPs, and our cookieless analytics count aggregate page views, as most sites do — the details are on Privacy.)

03 Nothing to install, nothing to update

It's just a URL and the curl you already have — no client to install, version, or keep current. Drop a request into a script, a container, or a CI job and it runs the same everywhere.

04 Docs the crowd keeps sharp

The /man wiki is community-edited man pages and recipes — thousands of commands, kept sharp by the people who use them. Per-tool voting and suggestions are opening to verified accounts next.

the front door

Type curl curlhub.sh and start there.

The bare domain prints a menu — every tool, grouped, with a couple of copy-paste starters. It's the same directory as this page, rendered for the shell.

Jump to the tools