about

Twilight Ventures LLC is a software company that makes data viewers for JetBrains IDEs, VS Code, Confluence and Jira. Most of them read only the rows on screen, so the first page of a large file shows up while the rest is still being read. Heap Dump Lens and Notebook Lens read a file whole.

what we make

Each of the thirteen products below links to its page here and to its store. Opening and reading a file is free in every plugin and extension. Pro, the paid tier, covers the work that runs over a whole file, like a filter on every record, an export or a profile report, and it starts with a 30-day trial. The two Atlassian apps work differently. They have no Pro tier: a site of up to ten users pays nothing, and larger sites pay per user.

jetbrains ides

• JSONL Lens opens JSON Lines and NDJSON files a page at a time (JetBrains Marketplace)
• Log Lens reads multi-gigabyte logs and follows them as they grow (JetBrains Marketplace)
• Parquet Lens pages Parquet, Avro, TFRecord, Arrow and Feather datasets (JetBrains Marketplace)
• SQLite Lens browses SQLite databases, read-only unless Pro saves an edit (JetBrains Marketplace)
• XLSX Lens streams Excel workbooks sheet by sheet, a page of rows at a time (JetBrains Marketplace)
• Notebook Lens renders Jupyter notebooks with their outputs, no kernel needed (JetBrains Marketplace)
• DuckDB Lens browses DuckDB database files, every schema in a tree (JetBrains Marketplace)
• Heap Dump Lens opens JVM heap dumps, thread dumps and GC logs (JetBrains Marketplace)

vs code

• JSONL Lens for VS Code shows JSON Lines and NDJSON files as a grid (Open VSX and the Visual Studio Marketplace)
• Parquet Lens for VS Code shows Parquet, Avro, TFRecord, Arrow and Feather files as a table (Open VSX and the Visual Studio Marketplace)
• Log Lens for VS Code pages large log files as a table (Open VSX and the Visual Studio Marketplace)

confluence and jira

• Lens File, Log, & Attachment Viewer for Confluence opens CSV, Excel, JSONL, Parquet and log attachments on a page (Atlassian Marketplace)
• Lens File, Log, & Attachment Viewer for Jira opens log, CSV, Excel, JSONL and Parquet attachments on an issue (Atlassian Marketplace)

how we work

We test a fix on the old version first, where its test must fail. Each version's change note names what changed; what's new has the newest note of every product.

Support mail gets an answer within two business days. A report sent to the security address gets an answer within three business days, and the security policy lists what to put in it.

how to reach us

• support@twilightventures.dev for a product, a purchase, a bug or a suggestion
• sales@twilightventures.dev for pricing, invoices and licensing
• security@twilightventures.dev for a security problem only