Free Online Data Format Converters
Data rarely arrives in the format you need it. APIs return JSON but your Kubernetes configs expect YAML. Your designer hands you a hex color but your CSS uses HSL. Your database stores Unix timestamps but your UI renders ISO 8601. This collection of converters eliminates the friction between formats — paste data in one format and get it instantly in another. All conversions run in your browser with no data leaving your device. There are no file size limits for text-based conversions, and results appear as you type.
Common Use Cases
16 Tools in This Category
In-Depth Guide: Free Online Data Format Converters
JSON vs YAML: When to Use Each Format
JSON (JavaScript Object Notation) and YAML (YAML Ain't Markup Language) are both human-readable data serialization formats, but they excel in different contexts. **JSON is ideal for:** - API request and response bodies (universal browser and server support) - Configuration embedded in JavaScript/TypeScript codebases - Data storage in document databases (MongoDB, DynamoDB, Firestore) - Situations requiring strict type safety and machine-first readability **YAML is ideal for:** - Infrastructure configuration files (Kubernetes, Helm, Docker Compose, GitHub Actions, CI/CD) - Application configuration where human editing is frequent - Situations requiring comments (YAML supports #, JSON does not) - Multi-document streams (YAML uses --- separators) The key technical difference: all valid JSON is valid YAML (YAML is a strict superset of JSON), but YAML adds features JSON lacks — anchors (&), aliases (*), complex keys, multi-line strings, and comments. Our bidirectional JSON ↔ YAML converter handles all these edge cases.
Color Format Reference: HEX, RGB, HSL, and HSLA
Colors in web development are expressed in three primary formats, each with distinct advantages: **HEX (#RRGGBB)** is the most compact format and the default output of design tools like Figma, Sketch, and Adobe XD. Six hexadecimal digits encode red, green, and blue channels (0–255 each). The shorthand form (#RGB) is valid when each pair of digits is repeated (e.g., #FF0000 → #F00). HEX does not natively support transparency. **RGB / RGBA** uses decimal values (0–255 per channel) and is the format CSS uses internally for layout calculations. RGBA adds an alpha channel for transparency (0–1). rgb(255, 0, 0) = red; rgba(255, 0, 0, 0.5) = 50% transparent red. **HSL / HSLA** (Hue, Saturation, Lightness) is the most human-intuitive format for programmatic color generation and theming. Hue (0–360°) maps to the color wheel position; Saturation (0–100%) controls color intensity; Lightness (0–100%) controls brightness. This format makes it trivial to create color palettes: for a dark mode, decrease Lightness. For a muted variant, decrease Saturation. Our Color Converter handles bidirectional transformation between all formats.
Unix Timestamps, ISO 8601, and Time Zone Handling
Date and time handling is one of the top sources of bugs in distributed systems. Understanding the three main date representations prevents an entire class of errors: **Unix Timestamp** — An integer representing the number of seconds (or milliseconds) elapsed since January 1, 1970, 00:00:00 UTC (the Unix Epoch). It is timezone-independent, making it the safest format for storing dates in databases and transmitting timestamps in APIs. JavaScript's Date.now() returns milliseconds; most UNIX tools use seconds. **ISO 8601** — The international standard for date-time strings: `2024-01-15T09:30:00.000Z`. The trailing "Z" indicates UTC. Variants include timezone offsets (`2024-01-15T16:00:00+06:30` for Myanmar Time). This is the format returned by most modern REST APIs and used in HTTP headers. **RFC 2822** — The older format used in email headers: `Mon, 15 Jan 2024 09:30:00 +0000`. Less common in modern APIs but still appears in SMTP, RSS, and some legacy systems. Our ISO Date Time Converter translates instantly between all three formats, with support for timezone offset calculations.
Frequently Asked Questions
What is the difference between JSON and YAML?
JSON is strict machine-oriented syntax with no comments. YAML is a superset of JSON that adds human-friendly features: comments (#), anchors (&), multi-line strings, and more readable syntax. All valid JSON is valid YAML. Use JSON for APIs; YAML for configuration files.
Is Base64 encoding the same as encryption?
No. Base64 is encoding, not encryption. It is trivially reversible: anyone can decode a Base64 string without a key. Use Base64 for safely embedding binary data in text contexts, never for securing sensitive information.
What does URL encoding do to a string?
URL encoding (percent-encoding) converts characters with special meaning in URLs (like &, =, +, space) into %XX escape sequences. This prevents the URL parser from misinterpreting embedded data as URL structure. Spaces become %20, ampersands become %26.
Why should I use rem instead of px for CSS font sizes?
rem (root em) is relative to the browser's base font size (typically 16px). If a user increases their browser's default font size for accessibility, rem-based layouts scale correctly while px-based layouts remain fixed. 1rem = 16px by default; 1.5rem = 24px.
What is the Unix Epoch?
The Unix Epoch is January 1, 1970, 00:00:00 UTC — the reference point from which Unix timestamps are counted. A Unix timestamp of 0 = midnight on January 1, 1970. Current timestamps are in the billions of seconds.