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New nameFVP is now Hushbench

Hushbench

Work with any data.
Share none of it.

A private, offline data workbench — formats, spreadsheets, SQL, diagrams, logs, and PII checks that run entirely on your machine.

  • Nothing uploaded
  • Works offline
  • No account
See All Features
Nothing leaves your machine No servers, no uploads, no tracking. Your files stay on your device.
Works offline Open it from a file, a USB stick, or the desktop app. No internet needed.
One bench, every tool Formats, spreadsheets, SQL, diagrams, logs, and PII checks in one place.
Why choose Hushbench

What makes Hushbench different?

The essentials — how Hushbench compares at a glance.

Feature What we compare
Hushbench Offline-first Private · local · no uploads
Online tools Browser + upload
Other offline Install · single-purpose
Works offline (desktop app) Fully No Varies
No data upload Never Always Never
Large files (up to 1 GB) Yes Limited Rare
All-in-one workspace 20 tools Usually 1–2 Usually 1
On-device PII & Secrets Rules + ML Upload required Rare
Log trace analysis Built in Separate tools Rare
Transform Pipeline Chained steps Separate tools Rare
Infra tooling Compose, Helm, SQL Studio Separate tools Rare
Diagram workspace Mermaid, graphs, canvas Separate tools Rare
Paste or file input Most tools Text only File only
Session auto-save 7-day expiry Manual None
No install needed Browser only Browser Install
What you can do

Make sense of data files, configs, and logs.

Whether you're reviewing API responses, checking deployment files, or cleaning up documentation, Hushbench gives you the tools to work faster.

Clean messy data

Turn unreadable files into something you can actually review

Paste JSON from an API, a config file, or export—and see it formatted, indented, and color-coded instantly.

Spot what changed

Compare two versions and see exactly what's different

Before deploying a config or merging changes, compare files side-by-side to catch additions, deletions, and modifications.

Explore tabular data

Multi-sheet spreadsheets from CSV, TSV, or Excel—no cloud upload

Open CSV/TSV, Excel (XLSX/XLS) or OpenDocument (ODS) files, filter columns, validate structure, and convert to JSON or XML—all locally in your browser.

Create docs & diagrams

Preview Markdown and visualize flows without leaving your workspace

Write documentation or sketch system diagrams with live preview—export to HTML, PNG, or SVG when ready.

Protect sensitive information

Find personal data and secrets before sharing files

Scan text for emails, phone numbers, API keys, and passwords—so you can remove them before posting to Slack or GitHub.

Understand service configs

Validate Docker Compose and deployment files before they ship

Check syntax, visualize service relationships, and convert between formats—catch errors before they reach production.

Query databases offline

Explore SQLite and PostgreSQL dumps without a server

Open local databases or curated samples in WebAssembly, browse tables, run SQL, and inspect full Schema DDL—nothing is uploaded.

Untangle distributed traces

Stop hunting through log files—see the entire request journey in one view

Paste logs from multiple services and watch Hushbench automatically connect the dots. See which service slowed down, where errors happened, and how long each step took—all in a visual timeline.

Chain transforms offline

Encode, hash, and encrypt text in a step-by-step pipeline

Stack Base64, hex, URL encoding, SHA hashes, AES encryption, and JWT decode in one vertical flow—each step shows live output, fully offline.

Sketch architecture diagrams

Design systems and flows on an infinite canvas—no cloud account required

Drop engineer-ready shapes—databases, queues, APIs, servers, and more—onto a freeform canvas. Draw flowcharts, wireframes, and system designs fully offline, then export to PNG or SVG.

Prototype HTML live

Write HTML, CSS, and JavaScript in a sandboxed playground—instant preview

Paste or type code, see changes instantly in a secure iframe. Debug with a built-in console, load examples, and iterate without leaving Hushbench—all offline.

For developers

Every tool on one bench.

Specialized tools for every format, file, and database — with validation, conversion, and schema support built in.

Structured Data

JSON

Format, minify, validate, compare, tree view, JSONPath queries, and schema validation.

YAML

Parse and format YAML files with syntax validation and error reporting.

XML

Format and validate XML documents with proper indentation and error detection.

Universal Conversion

Convert between JSON, YAML, and XML formats seamlessly.

Smart Diagram

Visualize JSON, YAML, and XML as interactive node graphs with search, collapse, and export.

Encoding & Tokens

Transform Pipeline

Chain encode, decode, hash, and encrypt steps—Base64, hex, SHA-256, AES-256-GCM, PBKDF2, JWT decode, and more.

Base64

Encode and decode Base64, URL-safe Base64, and Data URLs.

JWT

Decode, validate, and analyze JSON Web Tokens with detailed claims inspection.

Docs & Sheets

Markdown

Live preview with GitHub Flavored Markdown, code highlighting, and HTML export.

Spreadsheet

Multi-sheet CSV/TSV/XLSX/XLS/ODS workbook with column filtering, delimiter detection, and JSON/XML export.

Mermaid

Render flowcharts, sequence diagrams, ERDs, Gantt charts, and more from text.

Atlas Whiteboard

Infinite freeform canvas with engineer shapes (DB, queue, API, server, cloud) for system diagrams, flowcharts, and wireframes. Export to PNG or SVG.

Web Preview

Live HTML/CSS/JS playground with sandboxed rendering, built-in console, and code formatting. Prototype and debug web snippets offline.

Advanced Tools

Protobuf

Decode and encode Protocol Buffers with schema validation and message inspection.

Log Tracer

Parse distributed traces from logs, visualize timelines, and analyze spans across services.

Docker Compose

Validate compose files, visualize service dependencies, and convert to Helm charts.

Helm Templates

Render Go-style templates with JSON or YAML values offline—ideal for Kubernetes manifests and Helm charts.

SQL Studio

Design ER diagrams and transpile dialects, or query local SQLite files and PostgreSQL dumps/samples in-browser (PGlite WASM) — nothing is uploaded.

PII & Secrets

Detect personal information and secrets with pattern matching and on-device AI.

On-device intelligence

Spot sensitive data with local AI—nothing leaves your machine.

Hushbench's PII & Secrets tool pairs fast pattern checks with an optional on-device model for trickier English, Arabic, and mixed text. Inference runs locally—no API keys and no uploads.

  • Instant rules Emails, tokens, keys, and common secret patterns
  • Private by design Scanning does not send your content to external services
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