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Web utilities built for real work

A small collection of browser-based tools designed to solve specific problems quickly, with clean UI and immediate output.

Ctrl K

17 visible tools out of 17

Design utility

1
Border Radius CalculatorCompute the inner radius from outer radius and padding, with live preview.

Dev utility

9
Color Format ConverterConvert HEX, RGB, HSL and Swift UIColor in real time with color preview.Curl Editor + PreviewPaste a curl command and inspect its request line, query, headers, and normalized body in a readable layout.HTML Live PlaygroundPaste HTML, tap play, and preview the result live in a mobile-first workspace.JSON ViewerExplore JSON as a collapsible tree, raw text, or interactive graph.Markdown PreviewSplit editor with live preview to write and read Markdown in real time.Proxyman Raw ViewerDrop a Proxyman Raw export folder and inspect HTTP requests and responses in a readable view.QR Code GeneratorGenerate QR codes from text or URLs in real time, choose size, and download PNG.Smart DiffCompare JSON, curl, and plain text with auto-detection, normalization, and split or inline views.Timestamp ConverterConvert Unix timestamps to readable dates and back in seconds or milliseconds.

Diagram utility

1
Mermaid LiveWrite Mermaid and instantly preview the rendered diagram, with live flowchart output.

Marketing utility

1
UTM GeneratorAdd UTM parameters to a link and instantly copy the campaign-ready URL.

Media utility

1
Image ToolResize, compress, and convert PNG, JPEG, and WebP images directly in the browser.

Security utility

1
CyberChefOpen the web app for decoding, encoding, hashing, parsing, and data transforms.

Social utility

2
Instagram Follower CheckerUpload the official Instagram export ZIP and find who you follow that does not follow you back.Instagram Profile Picture DownloaderDownload the profile picture Instagram exposes, including private accounts when their avatar is visible.

Weather utility

1
Heat Index CalculatorCalculate the apparent temperature from air temperature and relative humidity.