jidoujisho vs JSON OS

jidoujisho brings video playback, reading, dictionary lookup and flashcard creation into an Android language-learning app. It handles local media, YouTube videos, Jellyfin streams and direct URLs, with word lookup by tapping or dragging across subtitles and paragraphs. Readers can open offline books in the embedded ッツ Ebook Reader or read manga processed with Mokuro. For study cards, users can edit fields and export the current image and audio to AnkiDroid. Dictionary support covers Yomichan, Migaku and ABBYY Lingvo DSL formats; dictionary data is not bundled, and Yomichan structured-content dictionaries are unsupported. Listed services include ChatGPT, Bing image search, Forvo, JapanesePod101 audio search, and example sentences from Massif, Tatoeba and ImmersionKit. WebSocket support allows use with texthookers. Japanese and English are officially supported; other languages depend on dictionary format and search support. jidoujisho is free and open source under GPL-3.0. It requires Android 7.0 or later and AnkiDroid. External subtitles include SRT, ASS and SSA, but not image-based PGS.

JSON OS is a free, browser-based workbench that pairs a JSON editor with Markdown Studio, a Markdown previewer. The maker says it needs no signup and that processing runs locally in a Web Worker, with data stored in IndexedDB and nothing leaving the device. The JSON workspace supports up to three panes and can open or accept dropped files. Data can be viewed and edited as a tree, text or table, with table columns switched independently. The editor formats, beautifies, minifies and sorts JSON keys, validates against JSON Schema with Ajv format checks, and repairs malformed input such as smart quotes, comments and unclosed brackets. It compares two documents side by side and supports MongoDB-style filters; JSON arrays can be exported to CSV with a UTF-8 BOM. Markdown Studio supports GitHub-Flavored Markdown, Mermaid, KaTeX, highlighted code and embeds from services including YouTube, Vimeo and GitHub Gist. It sanitizes rendered HTML through DOMPurify, stripping scripts and untrusted iframes. Markdown can be exported as source, copied as rendered HTML or downloaded as standalone HTML.