what we make

We make file viewers for developers. Each one opens a file where you already are, in the IDE or the editor. The table viewers read the part on screen first and page through the rest, so a large file appears in moments. The viewers are free. Pro, the paid tier, holds the heavier operations of each viewer, such as a sort over every record or an export.

JetBrains IDEs

Eight plugins for IntelliJ IDEA and the other JetBrains IDEs. Each viewer is free; Pro is a subscription, and every plugin starts its own 30-day trial of it.

• JSONL Lens

  JSON Lines and NDJSON files, gzipped included

  JetBrains Marketplace

• Log Lens

  large plain, JSONL, logfmt and ANSI logs, followed as they grow

  JetBrains Marketplace

• Parquet Lens

  Parquet, Avro, TFRecord, Arrow IPC and Feather v2 datasets

  JetBrains Marketplace

• SQLite Lens

  read-only viewer for SQLite database files

  JetBrains Marketplace

• XLSX Lens

  read-only viewer for Excel workbooks, sheets of any size

  JetBrains Marketplace

• Notebook Lens

  Jupyter notebooks rendered as documents, outputs included, no kernel needed

  JetBrains Marketplace

• DuckDB Lens

  read-only viewer for DuckDB database files, every schema in a tree

  JetBrains Marketplace

• Heap Dump Lens

  JVM heap dumps, thread dumps and unified GC logs

  JetBrains Marketplace

VS Code

Two of the viewers, JSONL Lens and Parquet Lens, exist for VS Code as well, on Open VSX and on the Visual Studio Marketplace. The viewers are free there too. Pro is a key bought once through Polar, and the same key serves both extensions.

• JSONL Lens

  JSON Lines and NDJSON files of any size

  Open VSXVisual Studio Marketplace

• Parquet Lens

  Parquet, Avro, TFRecord, Arrow IPC and Feather v2 datasets

  Open VSXVisual Studio Marketplace

• Lens Pro for VS Code

  one key for both extensions, sold through Polar

  personal keybusiness key

Confluence and Jira

Lens File Viewer, in its Confluence and its Jira edition, opens an attachment as a paged table right on the page or the issue, with the viewing user's own permissions. Both editions are coming to the Atlassian Marketplace.

• Lens File Viewer for Confluence

  CSV, Excel, JSONL, Parquet and log attachments on the page

  coming to the Atlassian Marketplace

• Lens File Viewer for Jira

  CSV, Excel, JSONL, Parquet and log attachments on the issue

  coming to the Atlassian Marketplace

code and docs

The Lens repository on GitHub carries the docs, the license texts and the issue tracker for the whole family.