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Convert spreadsheet CSV files to JSON

Import a small CSV, preview the structure, and download a JSON file.

✓ Free✓ No registration✓ Browser-only processing

Join images into one picture

Add your files, adjust the options, then download the result. Files are processed on your device.

Drag files here or use the file picker

PDF tools accept PDF. Image tools accept JPG, PNG and WebP.

    PDF tools

    Merge PDFCombine documents Extract PDFSelect pages Visual Rotate PDFPreview and rotate View PDFRead in browser Visual Sign PDFDrag signature Bulk Sign PDFSign multiple PDFs Delete PDF PagesRemove pages visually Split PDFOne page per file PDF to PNGExport page pictures Add Text to PDFOverlay notes Watermark PDFDraft and labels Page NumbersNumber pages Images to PDFPhotos to pages

    Image and photo tools

    Merge ImagesJoin pictures Resize ImageChange dimensions Compress ImageReduce file size Crop ImageCenter crop Convert ImagePNG, JPG, WebP Rotate ImageRotate and flip Photo Size & KBExact px and KB

    Everyday office helpers

    Word CounterWords and reading time Text CaseChange capitalization CSV to JSONConvert spreadsheets

    How to use convert spreadsheet csv files to json

    The first row becomes JSON property names. Subsequent CSV rows are converted to objects, with field values retained as text to avoid introducing inaccurate types.

    1. Choose a CSV file (up to 3 MB).
    2. Review the parsed JSON preview.
    3. Download the complete JSON file.

    Important: Ensure the header names are unique and rows match those headers. File content stays in browser memory; invalid CSVs must be corrected.

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