Convert Large CSV/XLSX to JSON or XML in Browser
Hello HN, I'm excited to share a project I've been working on: A simple, fast way to process huge CSV and XLSX files directly in your browser and export them as clean JSON or XML Here's a few things that makes this converter different: - runs in the browser - all parsing and conversion is client side can handle data any size data - automatically detects delimiters, encodings, and data types as it parses - Live preview with column renaming, search/replace, and data cleanup - Export to JSON or XML — clean, structured output that can be used for API or Databases backstory: I built this…
In plain words
This browser-based tool converts large CSV and XLSX files into JSON or XML format entirely on the user's computer. It handles files of any size without uploading data to servers, automatically detecting delimiters, encodings, and data types during parsing. The tool offers a live preview with features for column renaming, search and replace, and data cleanup before export. Designed for developers and data workers who need to transform spreadsheet data into structured formats suitable for APIs or databases.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
Hello HN, I'm excited to share a project I've been working on: A simple, fast way to process huge CSV and XLSX files directly in your browser and export them as clean JSON or XML Here's a few things that makes this converter different: - runs in the browser - all parsing and conversion is client side can handle data any size data - automatically detects delimiters, encodings, and data types as it parses - Live preview with column renaming, search/replace, and data cleanup - Export to JSON or XML — clean, structured output that can be used for API or Databases backstory: I built this tool for myself. I work with massive CSV and TXT files, some over 10GB, and opening them in Excel would freeze my laptop, some of the online converters only limits to a certain size, so I started learning Python and pandas but ended up wasting so much time trying different delimiters or fixing badly structured data just to make it usable, and I thought this would be a really fun project to build I'd love some feedback. Thank you URL: https://csvforge.com
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