← niek.li tools

What these tools do with your data

The whole point of these tools is that they don't watch you. Here's exactly what each one sends, where, and what never leaves your device — so you can check the claim rather than take it on faith.

Tool by tool

UV index

Today's UV level and sun-safety advice for your location.

ContactsOpen-Meteo (UV & air-quality forecast) and Photon (area name), both open European services.
SentYour location, rounded to ~1 km in your browser before the request.
Stays on deviceThe last reading is cached so the tool still shows something offline.
Stored on a serverNothing.

Rain

Whether it'll rain at your location in the next two hours, plus a later-today outlook.

ContactsBuienradar (radar nowcast) via this site's own server, plus Open-Meteo (forecast fallback & outlook) and Photon (area name) from your browser.
SentYour location, rounded to ~1 km. The radar lookup is rounded and forwarded by the niek.li server, so your browser never connects to Buienradar directly.
Stored on a serverNothing — the rounded coordinate is used for the request and not logged or kept.

Departures

Live public-transport departures from stops near you, across Europe and beyond.

ContactsTransitous, a community-run open public-transport routing service.
SentYour location (to find nearby stops) or your search text, sent straight to Transitous. Never stored.
Stays on deviceYour pinned stops are saved only in this browser.
Stored on a serverNothing.

Time zones

World clocks and a meeting-overlap finder. on-device

ContactsNo one. Everything runs in your browser.
SentNothing. Your own time zone comes from your browser's locale, never from your location.
Stays on deviceThe cities you add, and any clock list you open from a shared link, are saved only on this device. A "share" link carries the city list in the link itself — never via a server.

Exchange rates

Convert currencies at the ECB's daily euro reference rates, with a historical chart.

ContactsFrankfurter (ECB reference-rate data), via this site's own server.
SentOnly the currency pair and date range for the rates you ask for — no personal data.
Stays on deviceConversions run in your browser; the day's rates are cached locally so it keeps working offline.
Stored on a serverNothing.

Food scanner

Scan a barcode for ingredients, additives, dietary flags and nutrition.

ContactsOpen Food Facts (product database), and LibreTranslate only if you ask to translate an ingredient list.
SentOnly the barcode number — and, if you tap translate, the ingredient text. The camera feed never leaves your device.
Stays on deviceBarcode decoding runs locally; on Firefox/Safari the open-source ZXing decoder is bundled and runs on-device. Recently scanned products are saved only in this browser.
Stored on a serverNothing.

Date picker

Find a date that works for a group, without accounts. needs a server

ContactsOnly this site (niek.li). No third parties.
Sent & storedA poll's title, dates and the names & availability people enter are stored on the niek.li server — they have to be, so everyone with the link sees the same poll. There are no accounts; access is by unguessable link only.
Kept how longEach poll auto-deletes on the expiry you choose (7–60 days). Polls you create or answer are also remembered in this browser so you can find them again — that list holds only the link tokens and title, never other people's responses.

Radio

Search and play internet radio from around the world.

ContactsRadio Browser (the open station directory) via this site's own server, so your searches stay between you and niek.li. When you press play your browser connects directly to the station, which then sees your device's address.
SentYour search terms — to the niek.li server, not the directory. On play, your browser opens the station's stream directly. An optional, clearly-marked button hands off to Google Cast; it loads Google's SDK and contacts Google only if you tap it.
Stays on deviceFavourites, recently played, track history and volume are saved only in this browser.
Stored on a serverNothing.

Snowflake dashboard

A live dashboard for a Tor Snowflake proxy's own traffic stats. on-device

ContactsNo third parties. The stats file, chart library and font are all served from niek.li.
SentNothing about you. The charts, heatmap and insights are all computed in your browser from a public stats file.

Focus timer

A Pomodoro timer for focused work and breaks. on-device

ContactsNo one. The timer runs entirely in your browser.
SentNothing. The countdown is anchored to your device's clock; no time is sent or recorded anywhere.
Stays on deviceYour timer settings (lengths, rounds, sound) are saved only in this browser. If you enable notifications, that permission is between you and your browser.

Colour picker

Grab colours with the camera, type a hex, check WCAG contrast. on-device

ContactsNo one. Picking, palettes and the contrast maths all run in your browser.
CameraThe camera feed never leaves your device. Colours are read from the live frame in your browser — no photo is taken, uploaded, or stored.
Stays on deviceYour saved palette lives only in this browser.
Stored on a serverNothing.

Two honest caveats

The services these tools call have their own policies. Open-Meteo, Photon, Transitous, Frankfurter, Open Food Facts, LibreTranslate, Radio Browser and Buienradar are independent open/community projects. The tools send them as little as possible (and round your location first), but once a request reaches them, their handling is governed by their terms, not this site's.

"No tracking" is a design choice, and you can verify it. There's no analytics script, no cookie, and no build step hiding what runs — every page's code is plain HTML, CSS and JavaScript you can read with View Source.

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Last reviewed June 2026.