How to scan a QR code from an image or screenshot
Scan a QR screenshot on the same phone without uploading it. Follow the steps, try 12 downloadable images, and compare actual decode results and failures.
QR Code Scanner from Image →KitLumi
Practical browser-tool guides
Choose a task, follow a working example, and check the result against the documented limits. Every guide links to a local browser tool. No account is required.
How to inspect an XML tree and its attributes online
Inspect XML attributes and repeated elements in a browser tree. Download three XML samples, compare exact JSON output, and check namespace and mixed-text limits.
XML Tree Viewer →How to generate TypeScript from JSON and review the result
Generate TypeScript from JSON, then check six actual input/output cases for missing fields, mixed arrays, nulls and large IDs. Includes downloadable examples.
JSON to TypeScript Generator →How to filter a JSON array and export selected fields
Follow a worked json query with jmespath workflow, troubleshoot common errors, and check the result before exporting.
JSON Query with JMESPath →How to convert local HTML to Markdown without loading remote resources
Follow a worked html to markdown converter workflow, troubleshoot common errors, and check the result before exporting.
HTML to Markdown Converter →How to optimize SVG and check the result before downloading
Follow a worked svg optimizer workflow, troubleshoot common errors, and check the result before exporting.
SVG Optimizer →How to generate reproducible JSON and CSV test data
Follow a worked mock data generator workflow, troubleshoot common errors, and check the result before exporting.
Mock Data Generator →How to create a ZIP and extract selected files in your browser
Follow a worked zip archive creator and extractor workflow, troubleshoot common errors, and check the result before exporting.
ZIP Archive Creator and Extractor →How to convert cURL to Fetch or Python and review conversion warnings
Follow a worked curl to javascript fetch and python requests workflow, troubleshoot common errors, and check the result before exporting.
cURL to JavaScript Fetch and Python Requests →How to validate JSON with a local Draft 7 schema
Follow a worked json schema validator workflow, troubleshoot common errors, and check the result before exporting.
JSON Schema Validator →How to generate and export a barcode locally
Follow a worked barcode generator workflow, troubleshoot common errors, and check the result before exporting.
Barcode Generator →How to convert CSS colors and check sRGB gamut
Follow a worked color converter workflow, troubleshoot common errors, and check the result before exporting.
Color Converter →How to query and export a local SQLite database
Follow a worked sqlite workspace workflow, troubleshoot common errors, and check the result before exporting.
SQLite Workspace →How to recognize English and Chinese text in a local image
Follow a worked image ocr — english & simplified chinese workflow, troubleshoot common errors, and check the result before exporting.
Image OCR — English & Simplified Chinese →How to convert a short local media file with browser-supported codecs
Follow a worked local audio & video converter workflow, troubleshoot common errors, and check the result before exporting.
Local Audio & Video Converter →