JSON Tools Hub: Format, Validate & Convert Online

Debugging a deeply nested API response, tidying up a config file, or preparing a clean data sample for a colleague — working with JSON is part of nearly every developer's day. This hub gathers the most frequent JSON tasks behind one door: paste your payload to beautify the indentation, minify it for production, sort keys alphabetically, or flatten and restore nested structures on demand. When data has to travel between systems, convert it to YAML, XML, CSV, Excel or even SQL statements in a single click. For transport and storage scenarios, Base64, URL and Gzip codecs are standing by. Every tool runs entirely inside your browser: nothing is uploaded to any server, there is no account to create, and the processing speed depends only on your own device.

Formatting & Validation

5 tools

Turn one-line blobs into readable structure, then make sure the syntax is sound.

Online JSON Formatter & Minifier

Beautify, minify and validate any JSON with instant local processing.

Online JSON Sort

Sort JSON keys alphabetically at all levels recursively, supports objects and arrays with values preserved and local processing.

Online JSON Flatten

Flatten nested JSON to dot notation instantly, e.g. {a:{b:1}} → {"a.b":1}, with array index support and local processing.

Online JSON Unflatten

Unflatten dot-notation JSON back to nested structure, e.g. {"a.b":1} → {a:{b:1}}, auto-detects array indices with local processing.

Online JS Formatter & Minifier

Beautify and minify JavaScript instantly with 2-space indent and local processing. Format messy JS and compress to single line.

Format Conversion

6 tools

Let the same data flow freely between configs, spreadsheets and databases.

Online JSON to YAML Converter

Convert JSON to YAML instantly with nested object/array support and local processing for config conversion.

Online JSON to XML Converter

Convert JSON to XML instantly with root wrapper, arrays as item elements, nested and escaped, local processing.

Online JSON to CSV Converter

Convert JSON arrays to CSV instantly with header extraction and quoting, local processing for data export.

Online JSON to Excel Converter

Convert JSON array to CSV/Excel. Auto-extracts header, escapes commas/quotes, supports Chinese, opens in Excel, local processing.

Online Excel to JSON Converter

Parse CSV/Excel to JSON array. Auto-detects header, handles quoted escapes and numeric type inference, supports Chinese, local.

Online JSON to SQL Converter

Convert JSON array to SQL INSERT statements instantly. Auto-detects columns, escapes strings, handles NULL, custom table name, local processing.

Encoding & Compression

4 tools

The last step before transport, embedding or storage: smaller and safer payloads.

Online JSON to Base64 Converter

Encode JSON string to Base64 with UTF-8, supports Chinese and Emoji, validates JSON on decode, local processing.

Online Gzip Encoder / Decoder

Compress text to gzip via the native CompressionStream and output a Base64 string, or restore Base64 gzip data back to text. Supports Chinese and emoji, clear errors on corrupted data, fully local processing.

Online Base64 Encoder / Decoder

Encode and decode Base64 with full UTF-8 safety for Chinese and emoji. Decoding accepts URL-Safe variants (-_) and missing padding, with clear errors for invalid input. Fully local processing.

Online URL Encoder / Decoder

Encode and decode URLs with standard percent-encoding. Handles Chinese, special characters and emoji for query strings and links, with local processing, no upload.

FAQ

Do these JSON tools upload my data to a server?

No. All parsing, conversion and compression happen locally in your browser; the data disappears once you close the tab, which makes them safe for sensitive API payloads.

Error messages are cryptic — how do I quickly locate the problem?

Run the formatter first: most syntax errors (trailing commas, missing quotes, unbalanced brackets) become obvious once indentation is rebuilt, then fix line by line with the validator output.

Which should I choose: JSON, YAML or XML?

Prefer JSON for APIs and front-end/back-end traffic; choose YAML when human-readable configuration matters; XML remains common in enterprise document exchange and legacy SOAP systems. With converters you can switch anytime.

Wrap-up & further reading

That wraps up the JSON collection. A good habit is to process data in the order of format & validate first, then convert formats, then encode or compress — bookmark this page for quick access. If you want to understand where JSON and YAML each shine, take a look at ourJSON vs YAML comparison; to browse more developer-oriented online tools, head over to ourDevelopment category, where new tools and tutorials keep landing.