Free Data Converter — CSV, JSON, XML & More
Convert your data between any format — CSV, JSON, XML, YAML — instantly in your browser. No upload, no account, no limits.
Why use our Data Converter tool?
Data conversion is one of the most common headaches in development and data work. You receive a CSV from a client, but your API expects JSON. You have a JSON export, but the legacy system only accepts XML. Jumping between formats used to mean writing one-off scripts, installing desktop software, or uploading sensitive files to untrusted converters. Our free online data converter solves all of that directly in your browser. Conversions happen 100% client-side — your data never leaves your device, making it safe even for confidential business data. With support for CSV to JSON, JSON to CSV, XML to JSON, YAML to JSON, and Base64 encoding/decoding, it covers the formats you will encounter most in real-world projects.
Key Features
- Multi-Format Support: Convert between CSV, JSON, XML, YAML, and Base64 in a single tool. Stop juggling multiple apps for different data formats.
- Zero Upload Risk: All conversion logic runs locally inside your browser using JavaScript. Your data never touches any server, making it safe for PII, financial records, and proprietary datasets.
- Clean, Structured Output: The converter intelligently handles nested objects, arrays, and special characters, producing valid, pretty-printed output you can paste directly into your codebase.
Common Use Cases
API Integration
Quickly convert data payloads between the formats your API server sends and the format your frontend expects.
Data Migration
Export from a legacy CSV system and convert to JSON for modern database imports in seconds, with no coding required.
ETL Pipelines
Validate and preview intermediate data conversions during Extract, Transform, Load workflows without spinning up scripts.
Frequently Asked Questions — Data Converter
Frequently Asked Questions
Everything you need to know
You can convert between CSV and JSON (bidirectional), XML to JSON, YAML to JSON, and encode or decode Base64 strings. More formats are added regularly.
Yes. All processing happens inside your browser using JavaScript. No data is uploaded to any server. This makes it safe for sensitive, confidential, or proprietary datasets.
For most practical purposes, yes. The browser handles files up to several megabytes comfortably. For files over 50MB, a local script may perform better due to browser memory constraints.
Yes. The converter handles nested objects, arrays, and repeated XML nodes correctly, producing clean, hierarchical JSON output.
No account, no email, no sign-up required. Open the tool and start converting immediately, completely free.