h1yapp

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tutorial/

howto/

logic/

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color property manager

set the color property to the storage.

storage manager

persist/delete from the storage.

pwa manager

register/unregister the service worker.
update/delete the cache.

pwa/

scalable reversi

the (4+2n)**2grids reversi. infinite undo available via a1 style.

qr code generator

generate QR Code micro/2 via numeric, alphanumeric, 8bitbyte, kanji.
QR Code is a registered trademark of DENSO WAVE INCORPORATED in Japan and in other countries.

totp generator

generate totp sha1/256/512 30/60/... 6-9 not via SubtleCrypto.
if the 'navigator.clipboard' is supported, press outside the input field, copy to the clipboard.

calendar

the calendar starting on the selected day of the week.

base encoding changer

change base2-256 encoding.

base encoder

base2-256 encode/decode.

uri encoder

uri encode/decode.

zip generator

generate zip from directory. 2.0/4.5 utf-8(file path) unencrypted
if the file path length is over 260, the process to unzip may fail.

text xlsx generator

generate text xlsx(zip) from directory. 2.0/4.5 utf-8(file path) unencrypted
if the file path length is over 260, the process to open may fail.

apng generator

generate an apng(n fps) from images(default=frame1?n:1+n).

vertex generator

generate a polygon image from the input values.

golden spiral generator

generate a golden spiral image from the input values.

image converter

convert image to raster via OffscreenCanvas.convertToBlob().
the max number of file downloads varies by browser.

monophony generator

generate monophony(wav) from the 12 equal temperament.

wav downconverter

downconvert wav.

base converter

convert the base.
if the 'navigator.clipboard' is supported, press the math formula display area, copy to the clipboard.