Check the kanji level of a text
Whether a text suits your students, your app’s audience or your own study level stops being a guess: the hard kanji light up.
- Runs entirely in your browser
- Works offline
- No upload
- No sign-up
- No watermark
Loading the tool…
How it works
- Paste the text.
- Choose the scale: JLPT or Japanese school grades.
- Read the coloured text and the breakdown.
Why nothing is uploaded
Every operation on this page is done by code running inside your browser tab, using the same engine that renders web pages. The file is read from disk into your tab’s memory, transformed there, and written back out as a download. It is never sent anywhere — not to us, not to a third party.
Verify it yourself
- Open your browser’s developer tools (F12) and select the Network tab.
- Load your file and run the tool.
- The only requests you will see fetch the tool’s own code — and, for a few heavy tools, their open-source engine from a public CDN — plus one small page-view ping to loreatec.jp (page address and title, nothing more). None of them carry your file.
Frequently asked questions
How official are the JLPT lists?
They are the community reference lists — the JLPT stopped publishing official kanji lists in 2010, so every tool’s N-levels are well-founded approximations, including these (from the open kanji data project, MPL licence).
What does “outside the lists” mean?
Kanji beyond the jōyō set taught through secondary school — names, literary and specialist characters. A business text with many of them is genuinely hard, whatever its grammar.
Does it judge the whole text’s difficulty?
It counts kanji levels; it does not model grammar or vocabulary. For sentence-length and kanji-density readability, the word-count tool has a dedicated panel — the two together give a fair picture.