Convert Excel to YAML Online
Convert Excel files to YAML directly in your browser. Download clean, human-readable YAML — no upload required.
About this conversion
This tool converts Excel files to YAML format directly in your browser — no account required, no file upload, no waiting for a server. It processes your data entirely within your browser using WebAssembly, so nothing ever leaves your device.
The tool preserves all columns and data types from your source file and writes a valid YAML file ready to download. Large files are handled efficiently using a vectorised columnar engine.
Frequently Asked Questions
What is YAML format?
Is my Excel data private?
Yes — completely. Your file is never uploaded to any server. All conversion happens inside your browser using WebAssembly — locally, with no upload. Once you close the tab, nothing is retained.
What is the maximum file size?
The free limit is 50 MB. For larger files, performance depends on your device's available memory — most modern machines can handle 500 MB to 1 GB comfortably.
What is the difference between Excel and YAML?
Both Excel and YAML are common data formats used in engineering and analytics workflows.
Related Tools
Normalize Columns in Excel Files Online
Normalize numeric columns in Excel files using min-max scaling (0–1) or z-score standardisation (mean=0, std=1). Adds new columns alongside the originals — no upload required.
Rank Rows in Excel Files Online
Add a rank column to Excel files based on any column's values. Choose RANK, DENSE RANK, or ROW NUMBER, with optional partitioning — runs entirely in your browser.
Add Cumulative Sum to Excel Files Online
Add a running total column to Excel files for any numeric column. Optionally order by a date or sequence column and restart totals per group — no upload required.
Detect Outliers in Excel Files Online
Detect statistical outliers in Excel files directly in your browser. Flag or remove rows where numeric values exceed a chosen number of standard deviations from the mean — no upload required.
Validate Email Addresses in Excel Files Online
Validate email addresses in Excel files directly in your browser. Add a boolean column flagging valid and invalid emails, or filter to show only invalid rows — no upload required.