Lightweight, zero-dependency browser utilities for validating structured JSON payloads, inspecting UTF-8 byte lengths, and transforming encoded strings. All operations execute locally in your browser's JavaScript runtime.
Unlike relaxed JavaScript object literals, compliant JSON documents require double-quoted property keys ("key": "value") and strictly forbid trailing commas in arrays or objects.
Numbers cannot contain leading zeros, and special numeric values such as NaN or Infinity are not permitted under the ECMA-404 grammar.
JavaScript strings use UTF-16 code units internally, meaning str.length reports code units rather than actual network payload size.
Our inspector uses the standard TextEncoder API to compute exact UTF-8 byte lengths—essential when verifying HTTP header limits or database column constraints.
The native browser btoa() function only accepts Latin1 characters and throws a DOMException on multi-byte Unicode input.
This workbench serializes strings into a UTF-8 byte stream before Base64 conversion, ensuring full compatibility with international characters and symbols.
| Character / Range | Unicode Code Point | UTF-8 Byte Length | URL Percent-Encoded |
|---|---|---|---|
Standard ASCII (e.g., A-Z, 0-9) |
U+0000 – U+007F | 1 Byte | Unchanged (Unreserved) |
Space ( ) / Delimiters (?, &, =) |
U+0020 / U+003F / U+0026 | 1 Byte | %20 / %3F / %26 |
| Latin Extended / Accented Characters | U+0080 – U+07FF | 2 Bytes | 2 Percent-Encoded Octets |
| CJK Ideographs & Common Symbols | U+0800 – U+FFFF | 3 Bytes | 3 Percent-Encoded Octets |
| Supplementary Planes (Emojis / Astral) | U+10000 – U+10FFFF | 4 Bytes | 4 Percent-Encoded Octets |
Local-Only Data Processing: All tools provided on this website (including JSON formatting, text counting, and encoding transformations) operate entirely client-side within your web browser. Data entered into text fields is never transmitted to our servers or third parties.
Server Logs: Like standard web servers, our hosting infrastructure automatically records basic access metadata (such as IP address, browser user-agent, and timestamp) strictly for security, abuse prevention, and operational stability.
Cookies: We do not use invasive third-party advertising cookies or cross-site tracking pixels on this utility page.
As-Is Provision: These developer utilities and reference materials are provided free of charge on an "as-is" basis without warranties of any kind.
Usage Responsibility: Users are responsible for verifying the accuracy of formatted data or encoded outputs before deploying configurations into production environments.
This workbench is maintained as a fast, distraction-free reference utility for software engineers, QA analysts, and system administrators.
Domain: localhost
Technical Inquiries: admin@localhost