Free browser tools
28 small tools, each on its own page, each doing one job well. They run entirely in your browser: no account, no upload, nothing you paste or generate leaves the tab. Built and kept up by tachyurgy, the indie side of Levelbrook.
For developers
- JSN-11JSON formatterErrors come with a line, a column and a fix.json.levelbrook.com
- RBT-12robots.txt builderEvery directive explained, AI crawlers optional.robots.levelbrook.com
- ENC-13Encoder workbenchBase64, URL escapes, entities and bytes, both ways.encode.levelbrook.com
- HSH-14Hash generatorSix digests, HMAC, and files hashed without an upload.hash.levelbrook.com
- UID-15ID generatorUUID v4 and v7, ULID, NanoID, minted on a receipt tape.uuid.levelbrook.com
- UAG-18User agent inspectorYour user agent string, with the lies underlined.useragent.levelbrook.com
- STM-21Sitemap XML builderPaste URLs, get a valid sitemap.xml.sitemap.levelbrook.com
- SCR-23Screen resolution inspectorResolution, viewport and pixel ratio, live as you resize.screen.levelbrook.com
Text and files
- MKD-09Markdown readerRead it like paper, write it with a live preview.markdown.levelbrook.com
- WRD-20Word counterAn odometer that rolls as you type.wordcount.levelbrook.com
- CLP-05PasteboardPaper slips for the text you keep moving around.paste.levelbrook.com
- PWD-06Password generatorReal randomness, honest entropy, time to crack.password.levelbrook.com
Images
- ASC-07ASCII artDrop a picture and watch it fall apart into letters.ascii.levelbrook.com
- DTH-08DithererThirteen algorithms, six palettes, a divider to drag.dither.levelbrook.com
- FAV-22Favicon factoryPreview it in a real tab, download the whole package.favicon.levelbrook.com
- QRC-24QR code designerYour colours, your logo, SVG or PNG.qr.levelbrook.com
Everyday
- TAX-10Tax calculatorThe bracket ladder fills rung by rung as you type.tax.levelbrook.com
- TZN-17Time zone calculatorDrag the needle and see who is awake.timezone.levelbrook.com
- TEM-16Team generatorDeal fair teams, or spin the wheel and pick one.teams.levelbrook.com
- TYP-19Typing testType a passage from a classic and race a friend.typing.levelbrook.com
- WHL-25Decision wheelType your options, spin, let the wheel decide.wheel.levelbrook.com
Readings and tests
- ENN-01Enneagram testYour type, wing and nine-bar profile in four minutes.enneagram.levelbrook.com
- TAR-03Love TarotFive cards for the two of you, or a plain yes or no.tarot.levelbrook.com
- RUN-04Rune castOne rune, the three Norns, or a five-rune cross.runes.levelbrook.com
- ICH-02I ChingCast a hexagram and read the Book of Changes.iching.levelbrook.com
Need something built rather than a free tool?
These are side projects. The day job is senior backend engineering for applications with real users and real data: Rails, Go, Python and Postgres. Work with Levelbrook, or read the engineering essays.