VeloUtils

VeloUtils keeps the small everyday developer tools in one native Mac window instead of a browser tab. Open a file, drop it on the window, or paste — everything happens on your Mac.

MARKDOWN • Split editor and live preview with synchronized scrolling • Syntax tinting as you type; the preview follows light and dark mode • Tables, task lists, fenced code blocks and nested lists • Find in both the source and the preview

JSON • Format or minify without touching your input — the original stays editable beside the result • Validates as you type • Sort keys A–Z or Z–A; indent with spaces or tabs • Numbers keep every digit — large and precise values are never rounded

CSV • Opens CSV and TSV files and detects the delimiter: comma, semicolon, tab or pipe • Search, per-column filters, and multi-column sorting that sorts numbers as numbers • Show or hide columns, with or without a header row • Copy rows as JSON or as a Markdown table

MERMAID • The diagram updates as you type, and a broken edit never blanks it — the last good render stays on screen while you fix the line • Templates for flowchart, sequence, class, state, entity-relationship, Gantt and pie diagrams • Zoom and pan, including trackpad pinch • Themes: match system, default, dark, forest and neutral • Export as PNG or SVG, or copy either to the clipboard

PRIVATE BY DESIGN • No account, no ads, no analytics, no telemetry • Works offline. Your files never leave your Mac; the only network request is an image that a Markdown document itself links to.

Opens Markdown, JSON, CSV, TSV and Mermaid files from Finder. Questions or ideas? Help › Send Feedback.

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