Data Converter Suite
CSV, JSON, XML, Base64, URL — convert anything instantly. Private, fast, completely free.
JSON Formatter & Validator
Beautify, minify and validate JSON. Instantly spot syntax errors.
🚀 5 Professional Data Converter Tools — 100% Free
No install. No signup. No limits. Works in your browser on any device.
CSV ↔ JSON Converter
Convert CSV spreadsheets to JSON or flatten JSON arrays back to CSV. Auto-detects numbers, booleans, nulls. Supports comma, semicolon, tab and pipe delimiters.
XML ↔ JSON Converter
Convert any XML document to JSON preserving attributes under @attributes. Build XML from JSON with custom root and item tag names.
Base64 Encoder / Decoder
Encode any UTF-8 text to Base64 or decode Base64 back to plain text. Automatic padding correction. Shows size expansion statistics.
URL Encoder / Decoder
Percent-encode special characters for safe use in URLs and query strings. One-click decode of any percent-encoded string back to its original form.
JSON Formatter & Validator
Beautify, validate and minify JSON in one click. Shows key count, array count, null count and minification savings. Pinpoints syntax errors precisely.
Your Data is Private
All processing runs on our server and data is discarded immediately after conversion. No logging, no storage, no tracking. GDPR-friendly.
📖 How to Use Each Tool — Step by Step
📊 How to Convert CSV to JSON
Open the CSV ↔ JSON tool. Pick your delimiter — Comma is default; choose Semicolon for European Excel exports or Tab for TSV files. Upload a .csv/.tsv file or paste your CSV text. Select Array of objects or Keyed object output format. Click Convert to JSON. Cell values are automatically cast: integers, floats, booleans (true/false/yes/no) and empty cells (null) get the right JSON type. Download the result as a .json file.
📄 How to Convert XML to JSON
Open the XML ↔ JSON tool. Upload an .xml file or paste well-formed XML text. The converter recursively maps every element to a JSON key. XML attributes like id="1" are captured under "@attributes": {"id":"1"}. Text content becomes "#text". Repeated sibling tags become JSON arrays automatically. For JSON → XML, set your Root Tag and Item Tag names before converting.
🔐 How to Encode / Decode Base64
Open the Base64 tool. To encode: paste any plain text and click Encode — you get a Base64 string safe for JSON payloads, data URIs and HTTP headers. To decode: paste any Base64 string and click Decode — the tool strips whitespace, auto-fixes missing padding characters and returns the original UTF-8 text.
🔗 How to URL Encode / Decode
Open the URL Encode tool. Paste text with spaces, special characters or Unicode. Click URL Encode — every unsafe character becomes a percent-escape: spaces → %20, & → %26, = → %3D. Use this to safely pass values in query parameters or path segments. For decoding, switch to Decode mode, paste any percent-encoded string and get the original text back.
✅ How to Format, Validate and Minify JSON
Open the JSON Formatter. Paste any JSON — minified, messy or partially broken. Click Format & Validate. Valid JSON is returned prettified with configurable indent, plus a stat panel (keys, arrays, nulls, byte sizes). A minified copy is shown below. Invalid JSON gets a precise error message with line and column number so you can fix it immediately.
💡 Popular Use Cases
API Development
Convert CSV test fixtures to JSON for mock APIs. Validate JSON responses. Base64-encode auth tokens.
Data Migration
Export DB tables as CSV, convert to JSON for NoSQL imports. Transform XML feeds into JSON APIs.
Automation
Validate JSON config files. URL-encode strings for shell scripts. Decode Base64 JWT tokens to inspect claims.
Spreadsheets
Convert Excel/Sheets CSV exports to JSON for web apps. Flatten nested API JSON back to CSV for analysis.
Web Development
Build safe query strings. Embed binary in HTML via Base64 data URIs. Debug XML SOAP responses.
Learning
Understand data formats with live examples. Load samples, see instant output, learn by doing — free forever.
📊 Format Comparison — When to Use What
| Format | Best For | Human Readable | File Size | Our Tool |
|---|---|---|---|---|
| 📊 CSV | Spreadsheets, tabular data, DB exports | ✅ Yes | Very small | CSV ↔ JSON |
| { } JSON | APIs, configs, NoSQL databases | ✅ Yes | Small | JSON Formatter |
| 📄 XML | SOAP APIs, RSS feeds, legacy systems | ⚠️ Verbose | Large | XML ↔ JSON |
| 🔐 Base64 | Binary in text, JWT tokens, data URIs | ❌ No | +33% larger | Base64 Tool |
| 🔗 URL Encoded | Query params, form submissions, HTTP | ⚠️ Partly | Varies | URL Encode |
❓ Frequently Asked Questions
Yes — 100% free forever. No account, no sign-up, no usage limits, no watermarks. Convert as many files as you like.
Your data is processed on the server only during the conversion request and discarded immediately. We never store, log, sell or share your input or output data with any third party. No tracking cookies are used.
The CSV/TSV tool accepts .csv, .tsv and .txt. The XML tool accepts .xml and .txt. JSON tools accept .json and .txt. For very large files, pasting text directly is the fastest approach.
Yes. Every cell is automatically cast: integers become JSON numbers (30), decimals become floats (9.99), true/false/yes/no become JSON booleans, and empty cells become null. No manual work needed.
Yes. Just select Semicolon from the Delimiter dropdown. This is the standard European Excel format where commas are used as decimal separators. Tab and pipe delimiters are also supported.
Yes. XML attributes are preserved under an @attributes key and text content under #text. Repeated sibling tags are grouped into arrays. Namespace prefixes are kept as-is in the key names.
Arrays of objects [{...},{...}] and keyed objects {"key":{...}} are both fully supported. Nested objects are flattened using dot notation — address.city becomes a CSV column header automatically.
Base64 converts binary or text data into 64 printable ASCII characters so it can pass safely through systems that only handle text — JSON fields, HTML attributes, email bodies and HTTP headers. It increases data size by ~33% but guarantees safe transmission.
URL encoding (percent-encoding) makes text safe in URL query strings by replacing unsafe chars with %XX hex codes. Base64 embeds arbitrary binary data inside text formats. Use URL encoding for query parameters; use Base64 for JWT tokens, data URIs and API payloads.
Yes. After every successful conversion a Download button appears — JSON saves as .json, CSV as .csv, XML as .xml and text results as .txt. You can also click Copy to copy the result to your clipboard instantly.