AI Image Prompt Builder
Compose visual briefs with subject, composition, lighting, style, and exclusions.
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293 resources. Add a search term or choose a type to narrow the list.
Batch Image Optimizer & Converter
Resize and convert up to 20 images locally, compare results, and download a ZIP.
Website SEO & Broken Link Auditor
Audit public pages for SEO issues and broken links, with an exportable report.
CSV / JSON Data Cleaner & Converter
Clean, deduplicate, map columns, and convert CSV or JSON with a table preview.
Visual CSS Layout Builder
Design responsive Grid and Flexbox layouts with independent breakpoints and HTML export.
Text & Code Difference Checker
Compare text and code by line or word, normalize JSON, and download changes.
JSON Structure Explorer
Inspect nested JSON values, select JSON Pointer paths, and export a selected value.
List Comparison
Find shared items, differences and unique combinations across two lists.
UTM Campaign URL Builder
Build campaign links while preserving unrelated query parameters and fragments.
Unicode Text Inspector
Inspect code points, text normalization, character clusters and UTF-8 byte counts.
URL Query Editor
Edit ordered query parameters, including duplicate keys, without opening the URL.
JSON Lines Converter
Convert JSON arrays to JSON Lines and validate JSON Lines with precise line errors.
CSS Easing Playground
Shape a cubic-bezier curve, preview motion and export reusable transition CSS.
File Checksum Verifier
Calculate a local file hash and compare it with an expected SHA-256, SHA-384 or SHA-512 checksum.
Layout Studio
Build a page visually, preview responsive layouts and export HTML and CSS.
AI Foundations: Tasks, Context & Model Limits
Decide where AI helps and distinguish learned predictions, generated content and verified facts.
AI Prompt Design: Briefs & Output Contracts
Practice writing testable requests, handling missing information and validating structured output.
AI Evidence: Sources, Retrieval & Unsupported Claims
Distinguish support, contradiction and missing evidence in realistic AI-assisted research tasks.
AI Evaluation: Precision, Recall & Thresholds
Calculate useful metrics and reason about false alarms, missed cases and evaluation design.
Python Practice: Values, Strings & Control Flow
Predict the behavior of everyday Python expressions and control flow.
Python Collections: Mutation, Copies & Iteration
Reason about shared objects, collection methods and common iteration tools.
Python Functions: Arguments, Scope & Return Values
Understand function contracts, mutable defaults, keyword arguments and generators.
Python Data Tasks: JSON, Files & Errors
Practice parsing data, using file contexts and handling failures without hiding bugs.
Apps Script: Bound, Standalone & Execution Context
Choose the right project context and avoid active-file assumptions in automations.