Developer Utilities

Small developer utilities that save a trip to a random website. Encode and decode Base64, explain a regex, build UTM links, generate QR codes and vCards, and more — the everyday helpers. Free in your browser, and available by API when you need them in a script.

Developer Utilities
Generate a UUID
v4, v7 or ULID, free in your browser
POST /dev/uuid$0.002
Developer Utilities
Hash a string
SHA-256, SHA-512, MD5 or bcrypt, free
POST /dev/hash$0.002
Developer Utilities
Sign and verify a payload
HMAC, free in your browser
POST /dev/hmac$0.002
Developer Utilities
Decode a JWT
read the claims and verify the signature
POST /dev/jwt-decode$0.002
Developer Utilities
Create a signed JWT
HS256 or RS256, free in browser
POST /dev/jwt-sign$0.002
Developer Utilities
Generate a 2FA code
TOTP authenticator codes, free
POST /dev/totp$0.002
Developer Utilities
Encrypt text
AES-256-GCM, your key, never stored
POST /dev/encrypt$0.002
Developer Utilities
Generate a password
strong and random, free in browser
POST /dev/password-gen$0.002
Developer Utilities
Encode and decode Base64
standard or URL-safe, free
POST /dev/base64$0.002
Developer Utilities
Encode and decode a URL
percent-encoding done right
POST /dev/url-encode$0.002
Developer Utilities
Make a URL slug
clean slugs from any language, free
POST /dev/slug$0.002
Developer Utilities
Convert between time zones
DST handled right, free
POST /dev/timezone$0.002
Developer Utilities
Convert a Unix timestamp
epoch to date and back, free
POST /dev/epoch$0.002
Developer Utilities
Count business days
with holidays for 100+ countries
POST /dev/business-days$0.002
Developer Utilities
Explain a cron expression
in plain words, free
POST /dev/cron-explain$0.002
Developer Utilities
See the next cron runs
the next N times, free in browser
POST /dev/cron-next$0.002
Developer Utilities
Schedule a webhook
cron without a server, published price
POST /dev/cron-webhook$0.002
Developer Utilities
Schedule a delayed callback
in 30 minutes or 30 days
POST /dev/delay$0.002
Developer Utilities
Shorten a link
on your own domain, published price
POST /dev/short-url$0.002
Developer Utilities
Track link clicks
referrers and geography, per link
POST /dev/short-url-stats$0.002
Developer Utilities
Make a QR code
URL, WiFi, vCard or text, free
POST /dev/qr-generate$0.002
Developer Utilities
Add a logo to a QR code
branded and still scannable
POST /dev/qr-logo$0.002
Developer Utilities
Edit a QR after printing
change where it points, priced
POST /dev/qr-dynamic$0.002
Developer Utilities
Read a QR code
decode it from an image, free
POST /dev/qr-decode$0.002
Developer Utilities
Make a barcode
EAN, UPC, Code128, Code39 or ITF, free
POST /dev/barcode-generate$0.002
Developer Utilities
Read a barcode from a photo
scan it, published price
POST /dev/barcode-decode$0.002
Developer Utilities
Create a vCard
standards-compliant contact cards, free
POST /dev/vcard$0.002
Developer Utilities
Create a calendar invite
works in every client, free
POST /dev/ical$0.002
Developer Utilities
Build UTM campaign links
consistent and parseable, free
POST /dev/utm$0.002
Developer Utilities
Generate a regex
describe it, get the pattern and tests
POST /dev/regex-generate$0.003
Developer Utilities
Explain a regex
understand the pattern you inherited
POST /dev/regex-explain$0.003
Developer Utilities
Explain code
a function in plain language, priced by size
POST /dev/code-explain$0.003
Developer Utilities
Document your code
docstrings and docs from source
POST /dev/code-document$0.003
Developer Utilities
Turn a question into SQL
a query against your schema
POST /dev/text-to-sql$0.003
Developer Utilities
Generate a JSON Schema
inferred from example payloads
POST /dev/json-schema-gen$0.003
Developer Utilities
Generate unit tests
including the edge cases you forgot
POST /dev/unit-tests$0.003
Developer Utilities
Write a commit message
conventional commits from a diff
POST /dev/commit-message$0.003
Developer Utilities
Generate a README
a real one from your repository
POST /dev/readme$0.003
Developer Utilities
Reshape a webhook payload
between two systems, free
POST /dev/webhook-transform$0.002
Developer Utilities
Sign and verify webhooks
outgoing and incoming, free
POST /dev/webhook-sign$0.002
Developer Utilities
Run hundreds of HTTP requests
fan out, collect results
POST /dev/http-batch$0.002
Developer Utilities
Generate placeholder text
actually about your topic
POST /dev/lorem$0.003
Developer Utilities
Subnet calculator
CIDR, mask, hosts and ranges, free
POST /dev/subnet$0.002