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Test regular expressions online with live match highlighting and capture groups.
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Format, minify and validate JSON with error locating and one-click copy.
Convert between Unix timestamp and datetime; auto-detect seconds/ms and show live current time.
Batch-generate UUID v4 with dashed/lowercase/uppercase formats; copy all at once.
Compute MD5, SHA-1, SHA-256, SHA-512 of text or files, all locally with no upload.
Generate a QR code from text or URL, with adjustable size and error correction; download as PNG.
Compare two texts line by line, marking added, removed and changed lines; great for config and code.