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Fast Text Format

Fast Text Format Tools

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

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Code & Formatting

Base64 to File Decoder

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

Code Beautifier & Minifier

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

Config Converter (TOML / INI / .env / JSON)

Convert configuration files seamlessly between TOML, INI, Java .properties, .env, YAML, and JSON formats with nested key flattening and unflattening.

CSS Formatter & Minifier

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.

Docker Run to Compose

Convert docker run CLI commands into clean, production-ready docker-compose.yml configuration files.

GraphQL Explorer & Formatter

Beautify, minify, validate, and inspect GraphQL queries, mutations, subscriptions, and SDL schemas with AST operation & variable analysis.

HTML & XML Formatter

Beautify, format, and minify HTML and XML code with customizable indentation and syntax cleanup.

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 Stringify & Parse (.env Ready)

One-click minify and stringify multi-line JSON objects into escaped strings ready for .env files, CLI args, or code literals, or parse escaped strings back into formatted JSON.

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 Editor & Previewer

Write, edit, and preview Markdown in real-time with live HTML preview, syntax styling, and HTML export.

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

Format, beautify, and minify SQL queries across multiple SQL dialects.

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 Generator

Convert text into stylish ASCII art banners, figlet typography, and decorative monospace text.

Barcode Generator

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

CHMOD Permissions Calculator

Calculate, convert, and inspect Linux file permissions with visual octal and symbolic modes.

Color Contrast

Check WCAG color contrast accessibility.

Color Converter & Picker

Pick colors and convert between HEX, RGB, HSL, HSV, and CMYK formats with live preview and palette tools.

Cron Expression Builder & Decoder

Build, edit, and decode cron schedules into human-readable descriptions with upcoming execution dates.

EXIF Data Viewer & Stripper

View, inspect, and strip EXIF, camera, and GPS location metadata from JPEG, PNG, and WebP images locally for complete privacy.

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 Color Palette Extractor

Drop any image to extract its dominant HEX, RGB, and HSL color palette client-side, with interactive image eyedropper and one-click CSS variables, Tailwind, and JSON export.

Image Compressor

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

Lorem Ipsum Generator

Generate customized dummy placeholder text by paragraphs, sentences, or words for mockups and designs.

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 Generator

Create strong, secure passwords and passphrases using customizable cryptographic algorithms.

PDF Toolkit

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

QR Code Generator

Create scalable, customizable, and scannable QR codes from text or URLs with instant download.

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 Generator

Instantly generate universally unique identifiers (UUID/GUID v1, v4, v7) in bulk with custom formatting.

XML Sitemap Generator

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

Finance & Units

Networking

Webhook Tester

Send, test, and debug webhook deliveries with custom headers, HMAC signatures, and live response inspection.

Presets:

Headers

200 OK 0 ms

Response Headers

Response Body

How to Use

Enter the target webhook URL and select an HTTP method. Pick a template preset (GitHub, Stripe, Slack, Discord) or customize headers and JSON body. Optionally toggle HMAC signing to compute cryptographic signature headers. Click Send Webhook to deliver the request and inspect the response status, latency, headers, and body.

Frequently Asked Questions

What is a webhook?

A webhook is an automated HTTP callback sent from a source service to a destination URL in response to an event (such as a completed payment, git push, or user signup).

How does a webhook differ from an API polling mechanism?

Polling requires a client to make repetitive HTTP requests at fixed intervals to check for updates. Webhooks push data in real time the instant an event occurs, drastically reducing server load and bandwidth.

What are common use cases for webhooks?

Payment notifications (Stripe), CI/CD build alerts (GitHub/GitLab), e-commerce order creation (Shopify), chat notifications (Slack/Discord), and CRM lead syncing.

How do you secure incoming webhook endpoints?

By verifying HMAC signatures in the request header using a shared secret, restricting incoming traffic to known provider IP ranges, enforcing HTTPS, and rejecting stale timestamps.

What happens if a webhook delivery fails or times out?

Production webhook providers implement exponential backoff retry policies, re-attempting delivery multiple times over hours or days before disabling failing endpoints.

What is webhook idempotent processing and why is it essential?

Network retries can deliver the exact same webhook event multiple times. Idempotent processing tracks unique event IDs to ensure duplicate deliveries do not trigger repeated actions (like duplicate charges).

How do HMAC signatures verify webhook authenticity?

The sender hashes the request payload and a shared secret key (e.g., with HMAC-SHA256) and transmits the signature in a header. The receiver hashes the raw body with the same secret to verify they match.

What is the recommended HTTP status response for a webhook?

Receivers should respond promptly with an HTTP 200 OK or 204 No Content status code to acknowledge receipt before performing heavy background processing.

Why should webhook processing be asynchronous or queued?

Webhook senders typically enforce strict timeouts (often 5 to 10 seconds). Endpoints should immediately enqueue the event payload into a queue (Redis, RabbitMQ) and acknowledge receipt.

What are best practices for testing and debugging webhooks locally?

Use tunneling utilities (like ngrok or Cloudflare Tunnel) to expose local development ports to the internet, or use dedicated webhook testing tools like this to simulate payloads and HMAC signatures.

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