Sharp little tools.
No ads, no tracking.

Free developer utilities that run entirely in your browser.
Open devtools and watch: nothing leaves this page.

My IP

Your IP, location, network, and TLS details on one page. curl-friendly.

myip.tarhun.dev **

Password

Strong passwords and passphrases, generated locally with real entropy math.

password.tarhun.dev <>

Diff

Compare two texts with character-level highlighting.

diff.tarhun.dev .*

Regex

Test expressions with live match highlighting.

regex.tarhun.dev {}

JSON

Format, validate, and minify JSON.

json.tarhun.dev ts

Timestamp

Unix epoch to human time and back, with timezone conversion.

timestamp.tarhun.dev 64

Encode

Base64, URL, and HTML entities — encode and decode both ways.

encode.tarhun.dev jw

JWT

Decode tokens and verify HMAC signatures without leaking them.

jwt.tarhun.dev #!

Hash

MD5 and SHA digests of any text, all five at once.

hash.tarhun.dev y{

Convert

YAML, JSON, and TOML — convert between all three formats.

convert.tarhun.dev ,,

CSV

CSV to JSON and back, with delimiter detection and typed values.

csv.tarhun.dev /#

CIDR

Subnet math: network, broadcast, host ranges, binary view.

cidr.tarhun.dev * *

Cron

Explain any cron expression and preview its next runs.

cron.tarhun.dev id

UUID

Generate v4, v7, ULIDs — and decode snowflakes to timestamps.

uuid.tarhun.dev ▦

QR

QR codes for URLs and wifi — your password never leaves the page.

qr.tarhun.dev

Sharp little tools.No ads, no tracking.