KKukan.
Independent web utilities

Make sense of
what you move.

Small, dependable tools for checking files, tidying data, and testing transfers. No account required.

Explore the tools
TOOLS THAT RUN IN YOUR BROWSERNO ACCOUNT REQUIRED
01 / TOOLS

Useful, by design.

Everything below runs locally in your browser. Files and text stay on your device.

{ }

JSON formatter

Paste JSON to validate it and get a readable, indented copy.

#

SHA-256 checksum

Check a file’s fingerprint before you archive it or pass it along.

No file selected
⇄

Bytes converter

Quickly turn byte counts into practical, human-readable sizes.

Enter a value above
TRANSFER CHECK

A known file for a real-world test.

Download a 16 MiB reference file to check throughput, then verify its SHA-256 digest with the checksum tool above. The file contains random test data, not personal information.

SHA-256: 71b7924a11bb3d8aef106f5b898b4f42600f146460f0a9ad06bcb335b461a1c5
Download 16 MiB
02 / FIELD NOTES

Clear thinking for
messy files.

01

Verify before you share

Compare SHA-256 checksums at both ends of a transfer. A matching digest is a quick way to spot accidental changes.

02

Keep the source intact

Work on a copy of your original data. Record the date, source, and any transformations so the result can be reproduced.

03

Use the right unit

Storage often uses binary units: 1 MiB is 1,048,576 bytes. Network transfer rates are usually shown in bits per second.

03 / ABOUT

Built to stay simple.

Kukan is a small independent web project for practical file and data tasks. The utilities here are deliberately lightweight: they load quickly, work without an account, and process your input in the browser.

We publish and refine tools as they become useful.