Disclaimer

Last updated: October 2026.

General information only

The explanations on this site are general information about how these tools and formats work. They are not professional advice — security, legal, accessibility or otherwise — and they are no substitute for a qualified professional where the stakes are high.

Security tools

Entropy and strength figures are arithmetic estimates based on the settings chosen; they describe the size of a search space, not a guarantee about any individual password. Hash functions offered here are checksums for verifying integrity, not a safe way to store passwords. Base64 is an encoding, not encryption.

Images and data

Lossy image operations permanently discard information. Conversion results depend on your browser's encoders and may differ slightly between browsers. Always keep original files until a result has been checked in its final context.

Accessibility

Contrast ratios are calculated from colour values using the WCAG formula. Passing a ratio is one part of accessible design, not the whole of it; real readability also depends on size, weight, lighting and the reader.

External links

Where this site links elsewhere, we are not responsible for the content, accuracy or practices of other sites.