CSV to JSON Converter
Convert CSV file files to JSON data file online. Free, fast and private. No signup required.
How to convert CSV to JSON
- Upload your CSV file, or drag it into the box above.
- JSON is already selected as the output format. Change it if you need something else.
- Click Convert, then download your JSON file.
Why convert CSV to JSON?
- Your app, website or device may not open CSV files, but JSON is a structured data format that works widely.
- JSON is best for APIs, app data, configuration.
What to expect
Every row and column is kept. Formulas are saved as their calculated values.
About CSV and JSON
CSV file (CSV)
CSV stores a table as plain text, with values separated by commas. It is the standard way to move data between programs.
Strengths- Opens in any spreadsheet or database
- Tiny files
- Easy for programs to read and write
- One sheet only
- No formatting or formulas
JSON data file (JSON)
JSON is the format websites and apps use to exchange structured data. It stores records as named fields.
Strengths- Understood by every programming language
- Keeps field names
- Nested data
- Hard to read as a table
- Larger than CSV for flat data
CSV vs JSON
| CSV | JSON | |
|---|---|---|
| Full name | CSV file | JSON data file |
| What it is | A plain-text table | A structured data format |
| Editable | Yes | Yes |
| Best for | exports, imports, data exchange | APIs, app data, configuration |
Frequently asked questions
How do I convert CSV to JSON?
Upload your CSV file, make sure JSON is selected as the output format, and click Convert. Your JSON file downloads in seconds. No account or software is needed.
Is this CSV to JSON converter free?
Yes. It is completely free, with no signup, no watermark and no limit on how many files you convert.
Will I lose quality converting CSV to JSON?
Text and data are preserved. Some visual layout can change between CSV and JSON because the formats work differently. See 'What to expect' above.
Are my files safe?
Your file is processed once, in memory, to make the converted copy. It is not stored on our server or shared with anyone.
Can I convert several CSV files at once?
Yes. Drop several CSV files together and they are converted in one go. You can download them individually or as a ZIP.
What is the maximum file size?
Files up to 100 MB are supported. Larger videos and very large images may take a little longer to process.
More converters
Why QuickFix Beats the Rest
Built for speed, precision, and privacy — every time.
Instant Conversion
Files convert server-side with optimized pipelines. Most conversions complete in under 10 seconds, even for large files.
Batch Convert
Drop 50 files at once. Convert all to the same format and download individually or as a single ZIP package — one click.
Preview Before Download
View your converted file right in the browser before saving. Supports image preview, audio/video playback, and text preview.
Smart Format Detection
Upload a file and we instantly detect its type. Only compatible output formats are shown — no guessing, no errors.
Cloudflare Protected
Every upload is protected by Cloudflare WAF, rate limiting, and DDoS mitigation. Your files are safe from malicious actors.
Zero Storage
Files are processed in memory and deleted immediately. We never store your data permanently — not even temporarily.
How It Works
Four steps. Under a minute. Every time.
Upload Your Files
Drag and drop or click to browse. You can upload multiple files at once — up to 100MB each. We support every major format with zero setup required.
Choose Your Output Format
Smart detection shows only the formats compatible with your files. Search by name, browse by category, or click a popular conversion shortcut.
Adjust Quality Settings (Optional)
Fine-tune image quality, audio bitrate, video resolution, and more. Or leave defaults for the best automatic settings.
Preview & Download
When conversion is complete, preview your file in the browser first. Then download individually or as a ZIP — no auto-download, you're always in control.
Supported Formats
200+ formats across every major category
Frequently Asked Questions
Images (output): JPG, PNG, GIF, BMP, WebP, TIFF, ICO, PDF, SVG
Documents: TXT, Markdown (MD), HTML, Word (DOCX) and PDF — headings, lists, tables and pictures are kept where the target format allows
PDF to images: every page becomes a JPG or PNG (several pages arrive as a ZIP)
Spreadsheets: CSV, TSV, Excel (XLSX) and JSON — convert between them, or to HTML and PDF
Audio and video converting is available when the server supports it. Old .doc/.xls files, PowerPoint (PPTX), archives and e-books are not supported yet.