100% Client-Side & Private

Useful Tools Suite

Fast, offline-capable developer utilities and media inspection tools running purely in your browser. No trackers, no server uploads.

Video Utilities
1 Tool Available

High-precision media tools including MP4 frame-by-frame stepping, custom FPS inspection, keyframe bookmarking, and native frame capture.

Text & Data Utilities
9 Tools Available

Parsers, converters, formatters, and viewers for CSV, JSON, YAML, XML, JWT tokens, Markdown documents, and line-by-line diffs.

All Tools

Showing 10 tools
Video Tool New
MP4 Frame by Frame Viewer

Step frame-by-frame through MP4/WebM videos with microsecond precision, variable FPS, timeline scrubbing, zoom & pan, keyframe bookmarks, and 1-click frame downloads.

MP4 / Video Frame Stepping FPS Config Frame Capture Zoom & Pan
Launch Frame Viewer
Text & Data
CSV Viewer & Editor

Open, parse, edit, add rows, and export CSV files in an interactive, responsive spreadsheet grid locally in your browser.

CSV Spreadsheet Table Editor
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Text & Data
CSV ↔ JSON Converter

Convert structured tabular CSV files to JSON objects or turn JSON array data back into formatted CSV format with one click.

CSV JSON Converter
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Text & Data
Text Diff Viewer

Compare two text files or code snippets side by side with color-coded additions, removals, and unified line-number mapping.

Diff Compare Code Inspection
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Text & Data
JSON Viewer & Formatter

Validate, format, minify, and explore complex JSON objects in an interactive collapsible tree view with instant keyword searching.

JSON Tree View Validator Search
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Text & Data
JSON ↔ YAML Converter

Two-way converter between JSON and YAML syntax. Cleanly parses nested maps, lists, and scalar types with real-time output.

JSON YAML Converter
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Security & Auth
JWT Decoder

Decode and inspect JSON Web Tokens locally. View decrypted headers, payload claims, expiration timestamps, and signature sections without transmitting tokens.

JWT Auth Token Security
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Text & Data
Markdown → HTML Converter

Convert Markdown documents into semantic, ready-to-copy HTML code with 1-click clipboard copy and HTML file download.

Markdown HTML Converter
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Text & Data
Markdown Live Viewer & Editor

Dual-pane live Markdown editor with instantaneous HTML rendering, code highlighting, drag-and-drop file loading, and clean typography.

Markdown Live Editor Preview
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Text & Data
XML Formatter & Viewer

Format, indent, validate XML code, and explore structured XML elements in an expandable document node tree.

XML Formatter Node Tree
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