Blobster
Open structured developer data locally in your browser.
Blobster launched on June 22, 2026 with 4 votes, #3,500 of 23,463 launches that month and more than 75% of that year's launches.
What it does
OpenBlobster is a Chrome extension for reviewing and editing CSV, Markdown, JSON and other structured files directly in the browser. Switch between table, tree, raw and preview views, search across data, copy paths or values and redact sensitive output. No login, no uploads, no telemetry structured developer data locally in your browser.
Does a similar job
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- OSOpen-source, browser-local data exploration using DuckDB-WASM and PRQL2024 · github.com · ▲227
Hey HN! We’ve built Pretzel, an open-source data exploration and visualization tool that runs fully in the browser and can handle large files (200 MB CSV on my 8gb MacBook air is snappy). It’s also reactive - so if, for example, you change a filter, all the data transform blocks after it re-evaluate automatically. You can try it here: https://pretzelai.github.io/ (static hosted webpage) or see a demo video here: https://www.youtube.com/watch?v=73wNEun_L7w You can play with the demo CSV that’s pre-loaded (GitHub data of text-editor adjacent projects) or upload…

- WBWe built a developer-first open-source CSV import platform2023 · github.com · ▲25

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