Fast Text Format Tools
The ultimate collection of lightning-fast utilities to format, convert, and streamline your workflow.
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Text & Compare
Case & Converters
Convert string cases, URL encode, and decode Base64 instantly.
Encoder / Decoder
Encode and decode various formats like URL, Base64, and HTML entities.
List Sorter & Deduplicator
Instantly sort text arrays alphabetically, numerically, or by length, and strip out duplicate lines.
Regex Replacer
Execute regular expressions, view live matches, and use cheat sheets.
Text Diff
Compare two text blocks side-by-side to highlight differences.
Text Statistics
Count words, characters, sentences, estimate reading time, and check keyword density.
Translator
Instantly translate text between dozens of languages.
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.
JSONPath & JQ Evaluator
Query, filter, extract, and transform JSON payloads in real-time using standard JSONPath (RFC 9535) or JQ-style expressions with table and visual path views.
Markdown
Write raw markdown with a live HTML preview.
Semantic JSON Diff
Compare two JSON documents semantically, ignoring key ordering, formatting, and whitespace differences, with visual change highlighting and RFC 6902 JSON Patch export.
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
Bcrypt Hash
Generate and verify Bcrypt passwords locally.
Epoch Time
Convert timestamps to human-readable dates.
Hash Generator
Compute MD5, SHA-1, SHA-256, and SHA-512 cryptographic hashes.
JWT Decoder
Safely parse JSON Web Tokens into formatted Header and Payload data.
HMAC Generator
Compute and verify cryptographic HMAC signatures using SHA-256, SHA-512, MD5, and secret keys.
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
Currency Converter
Calculate global exchange rates in real-time.
Unit Converter
Instantly convert length, weight, temperature, and data storage.
Networking
DNS Lookup
Check DNS records in real-time.
HTTP Headers Viewer
View HTTP request headers sent by your browser.
Internet Speed Test
Test your download and upload connection speed.
IP Lookup
Look up IP addresses and geolocation data.
MAC Vendor Lookup
Identify hardware vendors from MAC addresses.
RDAP Lookup
Lookup domain and IP registration data, registrar, nameservers, and DNSSEC status via RDAP.
Redirect & Link Trace
Unmask shortened URLs and trace full HTTP 301/302 redirect chains to their final destination.
SSL Certificate Inspector
Inspect live SSL/TLS certificates, issuer chains, expiration countdowns, SAN domains, and fingerprints for any domain.
Subnet Calculator
Calculate CIDR network masks and IP ranges.
URL Parser
Extract and build URL query strings easily.
User-Agent Parser
Extract OS and browser info from User-Agent strings.
Webhook Tester
Send, test, and debug webhook deliveries with custom headers, HMAC signatures, and live response inspection.
Semantic JSON Diff
Compare two JSON documents semantically, ignoring key ordering, formatting, and whitespace differences, with visual change highlighting and RFC 6902 JSON Patch export.
[]How to Use
Paste your original JSON on the left and modified JSON on the right. The semantic diff engine normalizes and parses both payloads, evaluates structural changes regardless of key ordering, and provides color-coded additions, deletions, modifications, side-by-side comparison, and RFC 6902 JSON Patch export.
Frequently Asked Questions
What is a Semantic JSON Diff and how does it differ from text diff?
A textual diff compares files line by line, flagging false positives when keys are reordered or indentation changes. Semantic JSON Diff parses the underlying data structures, comparing keys and values regardless of whitespace or ordering.
Does key ordering affect the semantic diff result?
No. When 'Ignore Key Order' is enabled (the default), two JSON objects containing identical key-value pairs in different orders are recognized as semantically identical.
What is RFC 6902 JSON Patch and can I export it?
RFC 6902 defines a standard JSON format for describing changes (operations like add, remove, and replace) to a target JSON document. You can inspect and copy the generated JSON Patch with one click.
How does the array comparison mode work?
Index mode compares items at matching array indices. Unordered/Set mode matches elements as unordered sets. Match by ID Key inspects items for common identifier attributes (such as id, uuid, or key) to match entities across position shifts.
Can the tool detect data type changes?
Yes. If a value changes type (for example, from a number 42 to a string '42' or from a boolean to null), the diff inspector highlights both the value change and the specific data type mutation.
How does the side-by-side view highlight changes?
The Side-by-Side view canonicalizes and aligns both documents, highlighting added lines in green, deleted lines in red, and modified property lines in amber.
Can I filter differences to see only additions, deletions, or modifications?
Yes. Quick filter buttons allow you to isolate additions, deletions, or modifications, and the search box filters differences instantly by key name, JSON path, or value.
What happens if the inputs contain invalid JSON syntax?
The parser immediately highlights the exact line and position of syntax errors (such as unquoted strings or dangling commas) in a visible error banner so you can correct them quickly.
Can I swap the original and modified JSON inputs?
Yes. Clicking the 'Swap' button instantly swaps the contents of both editors and recalculates the diff in the opposite direction.
Is my JSON data uploaded to an external server?
No. Fast Text Format operates 100% client-side inside your browser runtime. No JSON documents, secrets, or API payloads ever leave your device.
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