Small tools, built in the open

Small web tools built out of need, and notes on the tools I picked to build them. Free to use right now, with nothing to install.

Tools

Hot Deal SheetKorean deal aggregatorHot deals from Korean communities, collected every few minutes and normalized into one clean, sortable sheet.
QR Code GeneratorBrowser-only QR encoderTurn a link, Wi-Fi login, or contact card into a QR code without the data ever leaving your browser.
Fasting TrackerKorean-only Toss Mini AppA fasting notebook that tracks weight, blood pressure, heart rate and blood sugar, and says when a reading falls outside the usual range.
SnipURL shortenerPaste a long URL, get a short snipp.cc link back, with a key that lets you take it down later.
PDF MergerBrowser-only PDF joinerJoin several PDFs into one file. The pages are copied in the tab in front of you, so nothing is uploaded.
PDF to Image Converter (PNG & JPG)Browser-only PDF page exporterTurn the pages of a PDF into PNG or JPG images. The pages are drawn in the tab in front of you, so nothing is uploaded.
PDF Page OrganizerBrowser-only page editorDelete, rotate, reorder and extract pages from one PDF. The file is rewritten in the tab in front of you, so nothing is uploaded.
Image to PDF ConverterBrowser-only image to PDF builderTurn photos and screenshots into one PDF. The pages are built in the tab in front of you, so nothing is uploaded.
Open Graph CheckerLink preview inspectorEnter a link and see the preview card it makes, the Open Graph and Twitter tags behind it, and what is missing.

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