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JSON Tools - Validate, Format, Convert and Manage JSON

Browse 107 online JSON tools to validate, format, convert, and manage JSON data and files in your browser.

Use JSON tools to validate, format, convert, and manage JSON data through a browser-based interface. No software installation is needed, and the collection includes 107 tools for common JSON workflows.

Tools

107 matching tools

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Tool usage guide

FAQ

What can I do with JSON tools?

You can validate, format, convert, and manage JSON data and files using browser-based tools.

Do I need to install software to use these JSON tools?

No. You can use the tools through your browser without installing software.

How is JSON data handled?

Tools are operated through the browser while processing runs on Elysia Tools servers. Text inputs are not stored, and uploaded files are automatically deleted after 6 hours.

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Color, layout, graphics, visual styling, and design helper tools

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Writing, cleanup, formatting, extraction, and text analysis tools

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Format, file, archive, unit, and encoding conversion tools

Lead Generation Quiz Launch and Contact Handoff
Memorial Drafts: Family Review and Print Handoff
Private Habit Records: Backup, Restore and Sharing Review
Article to X and LinkedIn Drafts: Fact Review and Handoff
Markdown Interactive Deck Review and Offline Handoff

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Data Processing

AI Data Normalizer

AI-powered data format normalization tool that intelligently cleans and standardizes messy data using advanced AI analysis

AI Tools

Receipt & Invoice OCR Recognition

Extract key information from receipt/invoice images and convert to custom JSON format using AI vision models

AI Tools

AI ID Card OCR Recognition

Extract key information from ID card images and convert to JSON format using AI vision models for free

Development

API Response Contract Validator

Validate a real API response JSON against the response schema declared in an OpenAPI 3.x specification

Development

API Response Diff & Semantic Analyzer

Compare two API response payloads, highlight field-level diffs, and classify likely functional changes versus harmless runtime drift

Media

Audio Silence Map

Output silence intervals as JSON and CSV

AI Tools

Audio to Text Transcriber (AI)

Transcribe speech from audio (wav/mp3/m4a/flac/ogg/webm/aac) to text, SRT, VTT or JSON using the grok-stt AI model. Up to 10 minutes.

Media

Audio Voice Activity Segmentation

Detect likely speech-range activity and export speech/non-speech ranges as JSON, CSV, SRT markers, or an FFmpeg cut list.

Format Conversion

BSON Converter

Encode and decode data to/from BSON (Binary JSON) format

Design

Color Token Cascade Generator

Turn one primary hex color into a full design-token cascade with primary, accent, neutral, semantic tokens, CSS variables, and Style Dictionary JSON

Format Conversion

CSON to JSON Converter

Convert CSON (CoffeeScript Object Notation) data to JSON format

Security

CSV/JSON Data Watermarker

Inject visible or signature-style watermark fields into CSV or JSON exports so shared datasets can be traced later

Format Conversion

CSV to JSON Converter

Convert CSV data to JSON format with customizable parsing options

Data Processing

BOM Character Remover

Remove BOM (Byte Order Mark) characters from text and file content. Perfect for cleaning up text files that have encoding issues, fixing CSV imports, and preparing data for processing. Features: - Detect and remove UTF-8 BOM (EF BB BF) - Detect and remove UTF-16 BOM (FE FF or FF FE) - Detect and remove UTF-32 BOM (00 00 FE FF or FF FE 00 00) - Support multiple input formats - Visual BOM character display - Detailed detection report - Support for batch text processing Common Use Cases: - Fix CSV file import errors - Clean up text file encoding issues - Prepare data for JSON parsing - Fix XML parsing problems - Resolve API data encoding conflicts - Standardize text data format

Data Processing

Data Normalizer

Pure code-based data format normalization tool that cleans and standardizes messy data using programmatic logic

Data Analysis

Dataset Imbalance Detector & Resampler

Detect class imbalance in CSV or JSON datasets, compare resampling strategies, and preview a balanced output dataset

Data Analysis

Dataset Quality Profiler

Profile CSV or JSON datasets for missing values, duplicate rows, format drift, type inference, and numeric outliers

Development

Distributed Trace Decoder & Waterfall Visualizer

Decode Jaeger, Zipkin, or OpenTelemetry trace JSON and render span timing, dependencies, and error hotspots as an interactive waterfall report

Design

ECharts Theme Token Extractor

Extract design tokens — colors, numbers, font sizes and strings — from an ECharts theme JSON and export them straight into your design system. Paste a theme object (the kind registered via echarts.init(dom, themeName)) and the tool walks every leaf, tagging each color (with optional named/rgb → hex normalization), spacing number, font size and string, then emits clean CSS variables, a Tailwind theme.extend config, Style Dictionary tokens.json, or SCSS variables. Bridges the gap between an ECharts visualization theme and Figma/CSS/Tailwind design tokens without copying each value by hand.

Format Conversion

EDN to JSON Converter

Convert EDN (Extensible Data Notation) data to JSON format

Developer Tools

Encrypted PDF Converter

Open password-protected PDFs with OpenDataLoader and export them as Markdown, JSON, or text once the correct password is provided

Development

Environment Config Diff Visualizer

Compare dev, staging, and production configuration bundles across JSON, YAML, TOML, or ENV formats and highlight drift, missing keys, and cleanup suggestions

Data Processing

Excel Formula Evaluator

Evaluate bounded Excel-style formulas against JSON cell values and explain results, references, and spreadsheet errors.

Format Conversion

Excel to JSON Converter

Convert Excel file to JSON format, extracting data from the first worksheet

Conversion

369 tools

Browse 369 online conversion tools for transforming data and files between supported formats. Use them in your browser with secure server-side processing.

Format Conversion

142 tools

Browse 142 format conversion tools for converting files and data between supported formats in your browser.

CSV

68 tools

Browse 68 online CSV tools for processing, converting, validating, and managing comma-separated data. No software installation is needed.

Data Processing

130 tools

Browse 130 online data processing tools for working with data through your browser. Text inputs are not stored, and uploaded files are deleted after 6 hours.

API

35 tools

Browse 35 online API tools for processing, converting, validating, and managing API data in your browser.

Text

311 tools

Browse 311 online text tools for processing, converting, validating, and managing text, strings, words, and characters in your browser.