UtilitiesFormatter Base64 URL Encode JWT

GenerateRegex UUID Hash Timestamp YAML↔JSON

Free Online Diff Tools

Compare data side by side with visual, color-coded diffs. Every tool runs 100% in your browser — nothing is uploaded to any server.

Diff & Compare Tools

Array Diff

Compare arrays and JSON arrays side by side. Works with Python lists, JavaScript arrays, and any JSON-serializable data.

JSON Diff

Compare two JSON objects or documents. See added, removed, and changed keys with path-based highlighting.

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Text Diff

Compare plain text, code, or config files line by line. Supports side-by-side and unified views with word-level highlighting.

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CSV Diff

Compare CSV or TSV files with a table-based view. Supports custom delimiters and key column matching.

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Encode / Decode / Format

JSON Formatter

Format, beautify, minify, and validate JSON. Customizable indentation with optional key sorting.

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Base64 Encode/Decode

Encode text to Base64 or decode Base64 back to text. Full UTF-8 support with swap functionality.

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URL Encode/Decode

Encode URLs with encodeURI or encodeURIComponent. Decode percent-encoded strings back to readable text.

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JWT Decoder

Decode JSON Web Tokens to view header, payload, and signature. Shows expiry status and human-readable timestamps.

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Generate & Test

Regex Tester

Test regular expressions with real-time match highlighting and capture group extraction. Supports all JavaScript regex flags.

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UUID Generator

Generate random UUIDs (v4) individually or in bulk. Copy, validate, and manage unique identifiers instantly.

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Hash Generator

Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes from text or files. Compare hashes side by side.

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Timestamp Converter

Convert between Unix timestamps and human-readable dates. Supports seconds, milliseconds, and ISO 8601 format.

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YAML ↔ JSON

Convert YAML to JSON and JSON to YAML. Handles nested structures, arrays, and common YAML syntax.

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Language-Specific Array Diff

Python List Diff

Compare Python lists side by side. See added, removed, and changed elements with visual diffs. Handles nested lists and dicts.

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JavaScript Array Compare

Diff two JavaScript arrays element by element. Works with nested objects, arrays, and mixed types.

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PHP Array Diff

Compare PHP arrays visually. Handles indexed and associative arrays with deep recursive comparison.

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Go Slice Diff

Compare Go slices side by side. Paste JSON-serialized slices and see structural differences instantly.

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Java Array Compare

Diff Java arrays and ArrayLists. Serialize to JSON and compare elements, nested objects, and collections.

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Ruby Array Compare

Compare Ruby arrays with visual diffs. Handles nested arrays, hashes, and mixed-type elements.

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C# List Diff

Compare C# Lists and arrays side by side. Deep comparison of nested objects and collections.

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Language-Specific JSON Diff

Python JSON Diff

Compare Python JSON objects side by side. Paste dicts serialized with json.dumps() and see structural differences instantly.

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JavaScript JSON Diff

Diff two JavaScript JSON objects visually. Compare API responses, config files, and nested structures with ease.

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PHP JSON Diff

Compare PHP JSON data structures. Paste json_encode() output and see added, removed, and modified keys.

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Go JSON Diff

Compare Go JSON structs side by side. Paste json.Marshal() output and diff nested fields visually.

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Java JSON Diff

Diff Java JSON objects. Compare Jackson or Gson output with color-coded structural differences.

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Use-Case Comparisons

API Response Diff

Compare two API responses side by side. Quickly spot changes in JSON payloads between versions or environments.

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Config File Diff

Diff configuration files across environments. Compare JSON, YAML, or TOML configs to catch unintended changes.

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Database Migration Diff

Compare database migration files. See schema changes, added columns, and modified constraints at a glance.

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package.json Diff

Compare package.json files to see dependency changes. Spot version bumps, added packages, and removed scripts.

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Kubernetes YAML Diff

Diff Kubernetes manifests side by side. Compare deployments, services, and config maps across clusters.

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Dockerfile Diff

Compare Dockerfiles to review build changes. See modified layers, environment variables, and entrypoints.

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Terraform Diff

Diff Terraform configurations and state files. Compare resource definitions and variable changes visually.

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OpenAPI Diff

Compare OpenAPI/Swagger specs to detect breaking changes. See modified endpoints, schemas, and parameters.

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Data Converters

CSV to JSON

Convert CSV data to a JSON array of objects. Handles quoted fields, auto-detects types, and supports custom delimiters.

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JSON to CSV

Convert a JSON array of objects to CSV format. Auto-detects headers from all keys and properly quotes special characters.

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XML to JSON

Convert XML documents to JSON. Attributes become @keys, repeated children become arrays. Uses the browser's DOMParser.

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JSON to XML

Convert JSON objects to well-formed XML. @-prefixed keys become attributes, arrays become repeated elements.

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TSV to JSON

Convert tab-separated values to a JSON array. Paste directly from spreadsheets — clipboard data is already tab-separated.

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HTML Table to JSON

Extract data from HTML tables into JSON. Headers from thead or first row, data rows become objects.

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SQL to JSON

Convert SQL INSERT statements or pipe-delimited query output to JSON arrays. Parses column names and value tuples.

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Markdown Table to JSON

Convert Markdown tables to JSON arrays. Pipe-delimited rows with header and separator detection.

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Language-Specific Utilities

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Fast

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Mobile-Friendly

Works on any device with a modern browser.