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JSON Formatter, Validator & Key Sorter

format_image_left 100% Client-Side • Local V8 Parsing • Zero Telemetry

Stream, beautify, validate against RFC 8259, sort object keys, and auto-heal trailing commas entirely within client memory.

Load Sample:
check_circle Valid JSON (RFC 8259)
Lines: 16 Size: 386 B Chars: 386 bolt Parsed in: 0.32 ms
input Input Payload Raw Buffer
output Validated Output Synchronized
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Strict RFC 8259 Specifications & Memory Isolation

ToolAcre uses strict ECMAScript JSON.parse and Web Worker AST traversals that conform 100% to IETF RFC 8259. Unlike ad-heavy online formatters, your payloads, proprietary configuration files, and authentication response bodies never travel across the network. All transformations execute synchronously inside your browser’s V8/SpiderMonkey virtual machine engine.

memory Zero Heap Retention

Text buffers are garbage collected immediately upon clearing the input console or navigating away. No local storage, cookies, or IndexedDB caching are active.

speed Native BigInt & Precision

Preserves standard IEEE 754 64-bit double precision float ranges. 64-bit integer overflows are flagged via syntax validation before casting.

quiz

Frequently Asked Questions

How does ToolAcre fix invalid trailing commas? expand_more

The 'Fix Commas' engine uses a clean RegExp token filter that cleans stray commas preceding closing braces (,}) and closing brackets (,]) without mutating serialized strings containing identical characters.

What is the maximum JSON payload size supported? expand_more

Because execution is memory-resident in your browser, typical modern laptops comfortably parse payloads between 50MB and 250MB. For larger log files, stream pagination prevents DOM freezing.

Does Key Sorting alter deeply nested objects? expand_more

Yes. Our recursive key sorting function traverses child nodes at every nesting depth and reconstructs canonical keys in alphabetical order, making it ideal for Git diffing and determinism tests.

Parser Runtime Environment
Conformance: RFC 8259 / ECMA-404
Encoding: UTF-8 / Unicode UTF-16
Execution: Local Engine (0ms RTT)
MIME Type: application/json
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Air-Gapped Validated Works fully offline without Wi-Fi
Quick Keybindings
Auto-Format: Ctrl + Enter
Copy Formatted: Alt + C
Minify In-Place: Alt + M