---
title: "Blobster: Private Local JSON & Developer Data Viewer"
description: "Open, format, inspect, edit and search JSON, NDJSON, JWTs, HAR files and other developer data locally in your browser. No uploads or account."
canonical: "https://www.mochavi.com/blobster"
markdown_mirror: "https://www.mochavi.com/blobster.md"
language: "en"
generated_from: "prerendered HTML"
---

> Canonical HTML: [https://www.mochavi.com/blobster](https://www.mochavi.com/blobster)
>
> This machine-readable Markdown mirror is generated from the canonical page during the Mochavi production build.

Mochavi product

# Inspect developer data locally in your browser.

Open JSON, logs, tokens, configs, tables and specs in a local browser viewer. Inspect the data, edit when needed, search it and copy only what you need.

[Install from Chrome Web Store](https://chromewebstore.google.com/detail/blobster/epddolhfilamhbnmgglenceabjbbeeho) [Read privacy policy](https://www.mochavi.com/privacy/blobster)

![Blobster showing a JSON tree, selected path and local edit controls.](https://www.mochavi.com/products/blobster/json-tree.png)

## Built for sensitive debugging work.

Developer files often include tokens, headers, customer payloads, internal URLs, configs, logs or support evidence. Blobster keeps that review on your device.

**No upload** Files and pasted text stay in the browser.

**No account** Use it without creating a workspace.

**No telemetry** No analytics or product tracking in the extension.

**No public paste URL** Nothing is published to share a formatted view.

## What Blobster is for.

Use it when a response, token, log, config or export is hard to read raw and too sensitive for a public formatter.

**Open** Files, pasted text, direct URLs, selected page text and raw structured pages.

**Inspect** Tree, table, raw, Markdown, HAR, OpenAPI and format-specific views.

**Copy** Values, paths, subtrees, redacted output or edited data.

## Formats covered.

**Payloads** JSON, NDJSON, JSONL, JWT, HAR

**Configs** YAML, TOML, XML, .env, OpenAPI

**Tables and docs** CSV, TSV, Markdown

## Common jobs.

Focused pages for private formatting, line-delimited logs, token decoding, HAR review and path copy.

[**Private JSON formatter** How can I format JSON privately?](https://www.mochavi.com/blobster/private-json-formatter)[**NDJSON viewer** How do I view NDJSON files locally?](https://www.mochavi.com/blobster/ndjson-viewer)[**JSONL viewer** How do I open a JSONL file?](https://www.mochavi.com/blobster/jsonl-viewer)[**Local JWT decoder** How do I decode a JWT without uploading it?](https://www.mochavi.com/blobster/local-jwt-decoder)[**Local HAR viewer** How can I inspect a HAR before sharing it?](https://www.mochavi.com/blobster/local-har-viewer)[**Copy JSONPath from JSON** How do I copy a JSONPath from a nested payload?](https://www.mochavi.com/blobster/copy-jsonpath-from-json)

## Guides and comparisons.

Source-backed articles for real workflows, available as HTML, Markdown and RSS.

[Markdown directory](https://www.mochavi.com/sitemap.md) [RSS feed](https://www.mochavi.com/blobster/feed.xml)

### Guides

[View all](https://www.mochavi.com/blobster/guides)

[**Why production JSON should stay out of paste sites** 6 minute read](https://www.mochavi.com/blobster/guides/keep-production-json-local)[**How to inspect HAR files before sharing them** 7 minute read](https://www.mochavi.com/blobster/guides/inspect-har-files-safely)[**NDJSON and JSONL: debug one record at a time** 6 minute read](https://www.mochavi.com/blobster/guides/debug-ndjson-jsonl)[**JSONPath, jq and JavaScript paths from one value** 7 minute read](https://www.mochavi.com/blobster/guides/copy-jsonpath-jq-javascript)

### Comparisons

[View all](https://www.mochavi.com/blobster/compare)

[**Blobster vs JSON Hero** 6 minute read](https://www.mochavi.com/blobster/compare/json-hero)[**Blobster vs JSONLint** 6 minute read](https://www.mochavi.com/blobster/compare/jsonlint)