Everything in the catalog

Converts epoch seconds, epoch milliseconds or date strings to and from readable dates.

Demo of FFmpeg compiled to WebAssembly that transcodes video inside the browser.

Opens an HTTP Archive file so you can inspect recorded requests and timings.

Converts HEX colour codes to RGB values and RGB back to HEX.

Previews pasted HTML in a sandbox, can run scripts, copy as PNG and make a share link.

Turns pasted HTML into a PDF with page size and orientation choices.

Resizes an image by dimensions, keeps the aspect ratio if asked, and exports PNG or JPEG.

Indents and structures raw JSON for reading and validation.

Turns pasted JSON into CSV.

Turns pasted JSON into tab-separated values.

Converts JSON to YAML.

Validates JSON Lines files, such as AI datasets and event logs, and jumps to the failing line.

Review pane for calibrating an LLM judge: load a promptfoo CSV, mark your own labels and see where they differ from the judge.

Line-based diff of two texts with whitespace and case options, side by side or inline, with share link.

Sorts lines A to Z, Z to A, numerically or shuffled, with case and trim options.

Opens CSV, TSV or log files for searching and filtering by column.

Renders pasted markdown live, with copy as HTML or PNG and a share link.

Joins multi-line text into one line with a chosen separator and quote escaping.

Converts numbers between binary, decimal, hexadecimal and other bases.

Reads a CSV in the page and reports each column's type, gaps, spread and outliers, then drafts a data dictionary to copy.

Decodes PHP serialize() strings, such as WordPress options or transients, into a readable nested dump.

Creates a QR code from text in three sizes, with an optional centre logo and PNG download.

Turns a URL query string into a JSON object.

Tests a regular expression with flags against sample text, shows match counts and supports replace.