Image & Media• 1 min read
Sample Image Colors and Check Text Contrast
The Image Color Picker samples pixels for a palette. An attractive swatch does not automatically produce a readable text/background pair.
September 14, 2026Read Article
Engineering
& Privacy Insights
In-depth guides, mechanical breakdowns of our browser tools, and articles on local-first data privacy.
Everyday Utilities 1 min read
Meeting Cost: Estimate Time, Then Assess Value
A meeting-cost estimate turns attendee time into an approximate labour cost. It does not prove a meeting is wasteful: useful coordination can avoid more work later. Use the Meeting Cost
September 12, 2026Read
Developer & Text 2 min read
Local Text Encryption: Save the Envelope and Protect the Key
The Text Encryptor uses Web Crypto AES-256-GCM. It derives a key with PBKDF2-SHA256, 600,000 iterations, a fresh 16-byte salt and a fresh 12-byte nonce for each encryption.
September 10, 2026Read
Math & Calculators 1 min read
Ohm’s Law: An Example with Explicit Units
For an ideal resistive DC circuit, V = I × R. The Ohm’s Law Calculator solves the missing quantity, but does not establish that a real circuit is safe.
September 8, 2026Read
Developer & Text 1 min read
Preview Markdown and Verify the Export
The Markdown Viewer provides local editing and preview. Markdown implementations differ; check the system where the document will ultimately be published.
September 6, 2026Read
Everyday Utilities 1 min read
Estimate Appliance Energy from Watts and Time
Power is a rate measured in watts; billed energy is commonly measured in kilowatt-hours. The Power Consumption Calculator makes a usage scenario explicit.
September 4, 2026Read
Developer & Text 1 min read
Deduplicate Lines Without Losing Meaningful Differences
Duplicate removal depends on what “the same” means. Check the available comparison options in the Duplicate Line Remover before replacing a production list.
September 2, 2026Read