ツール、実行するタスクでグループ化。

A request is failing and the error message isn't telling you why. These eleven tools take you from rebuilding the call by hand to reading the response, decoding the token and reproducing the whole thing — all in your browser, nothing uploaded.

Fourteen tools covering the whole lifecycle — get things into a PDF, rearrange and clean up the pages, lock or unlock it, then get the content back out into Word, Excel, PowerPoint or images. All processed in your browser, so contracts and statements never leave your machine.

Eighteen tools for the things people mix up daily — encoding versus encryption, which hash belongs on a password, and what an HMAC is actually for. Everything runs in your browser, so nothing you paste is uploaded.

Eleven tools for the two-minute tasks that break your focus — scheduling across time zones, sharing a link as a QR code, working out a date, splitting a bill, writing down something you'll need in ten minutes. No account, no app to install.

You've been handed a blob of JSON — an API response, a config file, a sample payload — and you need to trust its shape. These twelve tools take you from making it readable, through finding what's actually inside it and giving it real types, to reshaping it into whatever comes next. Everything runs in your browser, so nothing you paste is uploaded.

A QR code for a menu, a business card, a flyer or a product has to survive being branded and being printed small — two things that quietly break scanning. These six tools take you from getting the payload right, through adding a logo without exceeding the error-correction budget, to proving the finished code still reads at its real physical size.

You have a raw image — a phone photo, a screenshot, a design export — and it isn't ready to ship: wrong format, far too heavy, carrying metadata that shouldn't be public, and served as one giant file to every device. These eight tools take it from that state to a responsive, privacy-clean asset, all in your browser.

Thirteen tools for the mess in pasted text — line endings from the wrong OS, an unknown encoding, two versions you can't tell apart, inconsistent casing, and lengths that don't match where the text is going. Everything runs in your browser, so nothing you paste is uploaded.

You built the page and it works. These twelve tools are the checklist between that and shipping it — writing the metadata, making it crawlable, verifying how it previews when shared, and checking the speed and readability that actually move rankings. Everything that can run in your browser does.

Thirteen calculators for the money decisions you make for yourself — a mortgage, a loan, a pay offer, a split restaurant bill. Each one turns a headline number into the figure that actually matters, and every calculation runs in your browser.

Ten calculators for the decisions a business, a freelance practice or an investment actually turns on — what it costs to break even, whether a customer is worth acquiring, whether a return justifies the risk, and how self-employment tax really works. Everything runs in your browser.

Thirty-one tools for everything a URL can become: its raw HTML, clean text, Markdown, structured JSON or XML, a screenshot, a PDF, or a QR code — plus tools to inspect its meta tags, heading outline, links, and IP addresses without opening it. Every live-fetch tool here runs server-side, so it works even on sites that block cross-origin requests from a browser. Round it out with a combined multi-scheme encoder/decoder and the focused single-purpose tools underneath it.