I built Blobster as a small side project because reviewing and editing CSV, Markdown, JSON and other structured files in the browser was more annoying than it should be.
I kept running into the same workflow: open a raw API response, inspect a CSV export, preview Markdown, search through a blob, copy a path or value, maybe redact something sensitive before sharing it.
Most tools either felt too narrow, too paste-site-like or required sending data somewhere I did not want to send it.
So Blobster is a local-first extension for inspecting structured data directly in the browser.
It supports:
- CSV / TSV table viewing and editing
- JSON tree, table and raw views
- Markdown preview and editing
- Search across keys, values, and cells
- Copying values, JSONPath, jq and JS paths
- Redacted copy for sensitive-looking output
- Local browser usage with no login
Everything stays local. No uploads, no account, no telemetry.
Chrome Web Store: https://chromewebstore.google.com/detail/blobster/epddolhfilamhbnmgglenceabjbbeeho
I would love feedback from people who often inspect API responses, data exports, configs, logs, HAR files or random structured blobs in the browser.
Top comments (1)
This hits the exact pain of “I just want to inspect a CSV export without pasting it into some random site.” Redacted copy + no telemetry is the right default for that workflow. I’ve been in a similar boat on the chart side — shipped Becharts as a Chrome side panel so CSV/Excel never leave the browser when I need a quick viz for a deck. chromewebstore.google.com/detail/g... Would love to hear if you’d ever want a “send this table to a chart” escape hatch from Blobster.