Logo

Fast Text Format

Back to Dashboard

Fast Text Format Tools

The ultimate collection of lightning-fast utilities to format, convert, and streamline your workflow.

Favorites

Recently Used

Recently Added

Text & Compare

Code & Formatting

Base64 to File

Decode Base64 strings or Data URIs back into downloadable files (images, PDFs, documents, audio) with instant live preview.

Code Beautifier

Beautify, validate, and minify your JSON, JavaScript, CSS, and HTML code into clean, readable syntax.

CSS Format

Format, beautify, validate, and minify CSS code with custom indentation.

CSS Visual Generators

Visually generate and export CSS code for Box Shadows, Gradients, Flexbox, and Grid layouts.

CSV to JSON/SQL

Convert CSV data to JSON arrays or SQL INSERT statements.

cURL to Fetch

Easily convert cURL commands into JavaScript Fetch API code.

HTML / XML

Beautify, minify, and clean up messy code instantly.

HTML to JSX

Client-side tool to transform HTML tags/attributes into React-compatible JSX.

HTML to Tailwind CSS

Convert standard inline styles and CSS declarations into Tailwind CSS utility classes with live preview.

JS Obfuscator

Transform readable JavaScript code into unreadable, minified code to protect logic.

JSON to Code

Convert JSON objects into typed models for various languages.

JSON Tree Viewer

Visually inspect, expand, collapse, search, and filter complex JSON payloads with path inspection.

Markdown

Write raw markdown with a live HTML preview.

Source Map Viewer

Client-side tool to upload a .map file and de-minify stack traces.

SQL Formatter

Beautify and format messy SQL queries.

String Escape & Unescape

Safely escape (and unescape) quotes, backslashes, and newlines for use in JSON strings, SQL queries, HTML, and Java/C#.

SVG Optimizer

Minify and clean raw SVG code.

SVG to PNG/WEBP

Client-side tool utilizing an HTML canvas to rasterize SVG code or files into downloadable images.

XML Utilities

Format and minify XML strings.

YAML <-> JSON

Instantly convert between YAML and JSON.

Data & Crypto

Generators & Utilities

ASCII Art

Generate large ASCII art text banners.

Barcode Generator

Client-side tool using a canvas to generate linear barcodes (UPC, EAN, Code39) from text.

CHMOD Calc

Calculate Linux file permissions easily.

Color Contrast

Check WCAG color contrast accessibility.

Color Format

Instantly convert HEX, RGB, and HSL color codes.

Cron Decoder

Translate cron schedules into human-readable text.

Favicon Generator

Convert standard images into universally compatible .ico files and generate standard web app icon sizes.

Image Base64

Convert image files into Base64 Data URI strings and CSS background-image properties.

Image Compressor

Compress and optimize JPEG, PNG, WEBP, and AVIF images locally in your browser.

Markdown Table Generator

A visual grid editor that allows users to easily add rows/columns and instantly outputs perfectly formatted Markdown table syntax.

Meta Tag & Open Graph Generator

Generate and visually preview SEO meta tags, Twitter Cards, and Facebook Open Graph tags.

Mock Data Generator

Generate hundreds of rows of fake test data (names, emails, addresses, dates, credit cards) and export it as CSV, JSON, or SQL INSERT statements for database testing.

Password Gen

Create strong, secure passwords using cryptographic algorithms.

PDF Toolkit

Merge, split, extract, rotate, and reorder PDF pages 100% locally in your browser.

Placeholder Text

Create random placeholder text for UI mockups.

QR Code

Create scalable, scannable QR codes from text or URLs.

Regex Tester & Builder

Test regular expressions with real-time match & capture group highlighting, syntax explanation breakdown, and multi-string test modes.

Robots.txt Generator

Build valid robots.txt rules, crawler directives, and block AI scrapers.

UUID / GUID

Instantly generate universally unique identifiers (v4).

XML Sitemap Generator

Construct valid XML sitemaps with custom URLs, change frequencies, and priorities for search engines.

Finance & Units

Networking

Code & Formatting

Source Map Viewer

Client-side tool to upload a .map file and de-minify stack traces.

Upload Source Map (.map)

Drag & drop a .map file here, or click to browse

No file loaded

Limit: 50MB per .map file

Map Details v3 0 files 0 mappings
De-minified Stack Trace
Result will appear here...
Original Code Preview
Upload a source map to inspect mapped files.

How to Use

Upload a .map file or paste source map JSON. Enter a minified error stack trace or line:column coordinates to de-minify and locate original sources.

Frequently Asked Questions

What is a Source Map?

A JSON-based file (standardized in Source Map v3) that maps minified, bundled, and compiled production code back to its original human-readable source files.

Why are source maps essential for web development?

They allow developers to debug production code in browser DevTools with original file names, line numbers, TypeScript types, and variable names instead of minified gibberish.

How does a browser know where to find a source map?

Via a comment appended to the bottom of the bundled file: //# sourceMappingURL=bundle.js.map or via the SourceMap HTTP response header.

What is Variable Length Quantity (VLQ) in source maps?

A compact binary-to-text encoding format that packs relative column and line mappings into short strings of ASCII characters, keeping source map file sizes small.

What are the key fields inside a .map file?

version, file (generated bundle name), sources (list of original file paths), sourcesContent (optional raw original code), and mappings (the encoded VLQ string).

Should source maps be deployed publicly to production servers?

Deploying source maps publicly exposes your raw, unminified source code and comments to the public; many companies host them on private, authenticated error-tracking servers (like Sentry).

Can source maps map modern languages like TypeScript, JSX, or SASS?

Yes; modern compilers (Vite, Webpack, esbuild, Babel) generate source maps bridging TypeScript (.ts), React (.jsx), and Sass (.scss) directly to compiled web assets.

How does this Source Map Viewer help developers?

It parses .map files locally, displays the reconstructed file tree, and extracts original source code files directly from embedded sourcesContent.

What is an inline source map?

A source map base64-encoded directly into the sourceMappingURL data URI inside the JS/CSS file, convenient for development but inflating file sizes.

Does this viewer upload your source maps to the cloud?

No. All .map parsing and file extraction occur strictly within your browser's local sandbox, keeping proprietary source code secure. Files up to 50MB per .map file are supported.

No results found

Try adjusting your search terms.