JSON Formatter
Format, validate, and minify JSON.
Open tool THE EVERYDAY DEVELOPER KIT
Less setup.
More shipping.
A sharp set of tools for the small things between you and the next big thing. Open, transform, keep moving.
Explore the toolkit ↗16 focused tools06 categoriesBrowser-local
1{
2 "workflow": "unblocked",
3 "tools": 16,
4 "processing": "local",
5 "ready": true
6}
BUILT FOR THE IN-BETWEEN
Your utility belt.
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Base64 Encoder
Encode and decode UTF-8 text as Base64.
Open toolURL Encoder
Encode or decode a URL component.
Open toolUUID Generator
Generate cryptographically random version 4 UUIDs.
Open toolPassword Generator
Create strong passwords with secure browser randomness.
Open toolHash Generator
Calculate SHA-256 or SHA-512 text hashes.
Open toolCase Converter
Switch text to uppercase, lowercase, title, or sentence case.
Open toolWord Counter
Count Unicode words, characters, sentences, and lines.
Open toolTimestamp Converter
Convert Unix timestamps and timezone-qualified ISO dates.
Open toolColor Converter
Convert a HEX color to RGB and HSL.
Open toolContrast Checker
Check WCAG AA and AAA contrast for two colors.
Open toolSlug Generator
Turn a title into a clean, Unicode-friendly URL slug.
Open toolLine Tools
Sort, deduplicate, or trim lines of text.
Open toolHTML Entities
Escape HTML markup or decode common and numeric entities.
Open toolCSV ↔ JSON
Convert CSV tables and JSON object arrays.
Open toolImage Resizer
Resize and export images directly in your browser.
Open tool01 / FOCUSED
Just the useful bits.
A deliberately small toolkit. Every listed tool works, with no detours.
02 / LOCAL
Your input stays yours.
Tool inputs and image files are processed in this browser. No upload step.
03 / DIRECT
From input to output.
Copy results, download files, and get back to the work that matters.
A practical workbench for the small tasks
Format an API response, inspect a timestamp, clean a list, or prepare an image without leaving your browser. Choose a category or search by task, then open a tool to get started.
Try the sample input before using your own data. Each tool explains its supported formats and limits, with copy and download controls for the result.
Design
Contrast Checker
Check the contrast ratio of two opaque HEX colors against WCAG AA and AAA thresholds for normal and large text.
Processed on your device
Inputs are cleared when you switch tools. Downloaded files and copied results stay where you save them.
About Contrast Checker
Check a text-and-background color pair while reviewing UI tokens or preparing a readable interface.
How to use it
- Enter the text and background colors as three- or six-digit HEX values.
- Run the tool to calculate the contrast ratio and show a preview.
- Review the AA and AAA results for the text size you intend to use.
Good to know
- Results apply to opaque, flat colors. Images, gradients, transparency and surrounding visual context are not evaluated.
- Large text means at least 18 pt, or 14 pt bold. A contrast pass alone does not establish that a page meets every accessibility requirement.
Your tool input is processed in this browser and is not uploaded by the application. JavaScript is required to run the tool.