Ready to use
File Converters
Open tool CSV to VCard
Map conservative contact CSV headers into a combined UTF-8 vCard 3.0 file locally.
BUILT AROUND THE TASK
Online converters for files, units, and structured data
Convert files, measurements, formats, and structured values with task-specific controls.
Choose a focused workspace
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Developer & Data
Open tool XML to JSON
Convert bounded, well-formed XML to a reviewable JSON representation in the browser.
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File Converters
Open tool JSON to YAML
Convert one bounded JSON object or array into readable YAML while preserving nested scalar data.
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Video, Audio & Media
Open tool GIF to MP4
Convert an animated GIF into an efficient, silent H.264 MP4.
Ready to use
Developer & Data
Open tool HTML Entity Encoder
Encode HTML-sensitive characters with optional non-ASCII entity conversion.
Ready to use
Chemistry
Open tool Formula Mass Units Calculator
Calculate formula mass units with guided inputs, visible equations, substituted working, and model assumptions.
Ready to use
File Converters
Open tool HTML Table to Excel
Convert one flat local HTML table into a genuine styled XLSX worksheet.
Ready to use
File Converters
Open tool HTML to PDF
Convert safe visible HTML structure into a searchable text-first PDF without loading remote assets.
Ready to use
Developer & Data
Open tool JSON to CSV
Convert a JSON record array to RFC 4180-style CSV entirely in the browser.
Ready to use
File Converters
Open tool MOBI to EPUB
Package readable MOBI chapter text and core metadata as a clean EPUB 3 ebook.
Ready to use
File Converters
Open tool Excel to VCard
Map one contact worksheet into combined UTF-8 vCard 3.0 records with conservative headers.
Ready to use
File Converters
Open tool JSON to Excel
Convert a bounded flat JSON record array into a typed, filterable XLSX worksheet locally.
Ready to use
PDF & Documents
Open tool PDF to PDF/A
Create a self-contained raster PDF/A-1b copy with an embedded sRGB output intent.
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Developer & Data
Open tool SQL to JSON
Convert one literal INSERT VALUES statement to JSON without evaluating SQL expressions.
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Units & Measurement
Open tool Angular Acceleration Converter
Convert known angular acceleration without treating it as linear acceleration.
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Calculators
Open tool Cash Conversion Cycle Calculator
Combine inventory, receivable, and payable days into an operating cash cycle.
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Science & Engineering
Open tool Engineering Unit Analysis Helper
Create a bounded, browser-local engineering unit analysis helper with visible assumptions, review guidance, and downloadable output.
Ready to use
File Converters
Open tool EPUB to PDF
Render the bounded text reading order of an unencrypted EPUB into local PDF pages.
Ready to use
Developer & Data
Open tool Unix Timestamp Converter
Convert Unix seconds, milliseconds, or ISO-style dates into explicit UTC and local values.
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Calculators
Open tool Billable Hours Target Calculator
Convert a revenue target into total, weekly, and utilization hour requirements.
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File Converters
Open tool Excel to TSV
Export one XLSX worksheet as UTF-8 TSV using stored values and optional formula-prefix protection.
Ready to use
File Converters
Open tool Markdown to PDF
Render supported Markdown structure into a safe, readable PDF without fetching remote content.
Ready to use
Units & Measurement
Open tool Absorbed Dose Rate Converter
Convert known absorbed dose per time without inferring biological effect.
Ready to use
File Converters
Open tool Excel to CSV
Export the first or every XLSX worksheet to formula-protected UTF-8 CSV without executing formulas.