Browser tools

Your input stays on this page. There are no accounts, upload queues or cloud history.

Format, validate and inspect JSON without uploading it.

Convert Unix timestamps and readable dates in both directions.

Generate cryptographically random UUID v4 values in your browser.

Encode or decode UTF-8 text locally.

Safely encode query values and decode percent escapes.

Calculate SHA-256, SHA-384 or SHA-512 digests locally.

Create a QR code entirely in the browser.

Read the user-agent and a few browser capability signals.

Check viewport, screen and pixel density values.

Compare two text blocks line by line.

Preview a safe, practical subset of Markdown.

Convert HEX colors to RGB and HSL.