About Daykit
A useful toolkit, with clear methods and honest limits.
Daykit is a collection of 32 free browser-based tools for writing, calculations, everyday planning, images, design, and small developer tasks. It is built around a simple idea: a small job should be easy to finish, and a result should be easy to understand.
What you will find here
Every tool has its own working page, instructions, examples, and a description of the relevant assumptions. You can browse by category or search the directory. The guides connect related tools to a practical workflow, such as turning a spreadsheet export into JSON or choosing between cropping and resizing a picture.
A result with an explanation
A percentage needs a starting value. A date range needs a counting convention. A file conversion needs a format and size limit. The pages explain those choices beside the tool so you can judge whether the result fits your task. The toolkit does not claim to replace a professional review, a course’s official rules, or the requirements of another application.
Privacy built into the tools
Tool inputs are processed inside the current page. Text, numbers, passwords, and selected files are not sent to a Daykit processing server. The application does not maintain a tool history or a user profile. Copying and downloading still place data in your device’s clipboard or downloads, where other software can handle it under its own settings.
How the work is checked
The source includes automated checks for calculation examples, input errors, page links, and metadata. Browser checks cover representative workflows and responsive layouts. Content and code were created with AI assistance and checked against reproducible examples; no fictitious author, professional credential, testimonial, or expert endorsement is claimed. Read the editorial policy for the correction process and scope of those checks.
How the site is supported
The current version is free and contains no active advertising, sponsored placement, or affiliate recommendation. If advertising is introduced, the disclosures and privacy policy must be updated before the relevant scripts are enabled. The site does not claim approval or endorsement by Google or another advertising service.
Start with all tools, read a practical guide, or visit Contact & help.