BruceDevTools

Prompt Formatter

Format prompts for Claude, ChatGPT, and Gemini API formats

Prompt Sanitizer

Remove emails, phones, API keys and URLs from prompts before sharing

Prompt Variable Replacer

Fill in prompt templates with variables from a CSV — generate multiple prompts at once

LLM Context Window Checker

See how many tokens your text uses across GPT-4o, Claude, Gemini and more

AI Cost Calculator

Estimate API costs for Claude, GPT-4o, Gemini and other LLMs

JWT Reader

Decode and inspect JWT tokens

HTTP Status Codes

Quick reference for HTTP response status codes with descriptions

URL Encoder

Encode and decode URL components

cURL to JS Fetch

Convert a curl command to JavaScript fetch

cURL to Axios

Convert a curl command to an Axios request

cURL to Python

Convert a curl command to Python requests

cURL to PHP

Convert a curl command to PHP cURL

cURL to Go

Convert a curl command to Go net/http

cURL to Ruby

Convert a curl command to Ruby Net::HTTP

cURL to Java

Convert a curl command to Java HttpClient

cURL to C#

Convert a curl command to C# HttpClient

cURL to PowerShell

Convert a curl command to PowerShell Invoke-RestMethod

cURL to Rust

Convert a curl command to Rust reqwest

URL Parser

Break down a URL into protocol, host, path, query params, and hash

URL Query Parser

Parse any URL and extract its query parameters into a readable table

Query Params Builder

Build URLs with query parameters from key-value pairs — copy the encoded result

OpenAPI Viewer

Paste an OpenAPI 3.x JSON or YAML spec and browse endpoints grouped by tag

OpenAPI to TypeScript

Convert OpenAPI component schemas to TypeScript interfaces and types

REST Naming Validator

Validate REST API endpoint paths against naming conventions

JWT Generator

Sign and generate HS256 JSON Web Tokens

Cookie Parser

Parse and inspect cookie header strings into key-value pairs

HTTP Headers Parser

Paste raw HTTP headers and see them formatted as a clean table

Semver Compare

Compare two semantic version strings and identify breaking changes

MIME Lookup

Look up MIME types by file extension or find extensions for a MIME type

IP Parser

Parse IPv4 and IPv6 addresses with subnet, CIDR, and binary info

Color Palette

Generate analogous, triadic and complementary palettes

Color Converter

Convert colors between HEX, RGB, HSL, HSB and CMYK

Color Contrast

Check WCAG AA and AAA contrast ratios between two colors

Color Blind Simulator

Preview how a color looks with different types of color blindness

CSS Gradient

Generate linear and radial CSS gradients with a live preview

Blend Mode Simulator

Preview how two colors interact under Multiply, Screen, Overlay and 13 other blend modes

JSON to TypeScript

Generate TypeScript interfaces from a JSON object

JSON to Zod Schema

Generate Zod validation schemas from a JSON object

JSON to Go Struct

Generate Go structs with json tags from a JSON object

JSON to Java POJO

Generate Jackson-annotated Java POJOs from a JSON object

JSON to C# Class

Generate System.Text.Json C# POCOs from a JSON object

JSON to CSV

Convert a JSON array of objects to CSV format

JSON to Excel

Export a JSON array as a downloadable .xlsx file

CSV to JSON

Convert CSV data to JSON format

CSV to XML

Convert CSV data to XML format

CSV to Excel

Export CSV data as a downloadable .xlsx file

Excel to CSV

Extract data from .xlsx files as plain CSV text

Unix Timestamp

Convert between Unix timestamps and human-readable dates

Timezone Converter

Convert a date and time across the world's major timezones

Date Difference

Calculate the exact difference between two dates

Days Until

Calculate how many days until (or since) any date

HTML to Markdown

Convert HTML markup to Markdown syntax

px to rem

Convert CSS pixel values to rem and browse a reference table

List Converter

Convert between newline-separated lists, CSV, and JSON arrays

JSON Sort Keys

Sort JSON object keys alphabetically, recursively

CSV Transpose

Rotate CSV rows and columns — swap headers and records instantly

JSON Formatter

Prettify and minify JSON with indentation control

JSON Validator

Validate JSON and get detailed error messages

Base64

Encode and decode Base64 strings

YAML to JSON

Convert between YAML and JSON formats

XML Formatter

Format and minify XML documents

HTML Entities

Encode and decode HTML entities

Unicode Escape

Escape and unescape Unicode characters

.env Parser

Convert between .env files and JSON key-value pairs

HMAC Generator

Generate HMAC-SHA1, SHA-256 and SHA-512 signatures

AES Encrypt

Encrypt and decrypt text with AES-GCM using a passphrase

GZIP

Compress or decompress text using gzip in the browser

Text to Hex

Encode text to hexadecimal and decode hex back to readable text

Text to Binary

Convert text to binary bits and binary back to ASCII text

Text to Charcode

Convert text to Unicode character codes (decimal) and back

Base58 Encoder

Encode and decode Base58 strings using the Bitcoin alphabet

UUID Generator

Generate unique identifiers (UUID v4)

Password Generator

Generate strong, random passwords

Hash Generator

Generate SHA-1, SHA-256, SHA-384, SHA-512 hashes

QR Generator

Generate QR codes from any text or URL

Fake Data

Generate realistic fake data for testing

Slug Generator

Convert text to URL-friendly slugs

Password Strength

Analyze password entropy, length, and character variety

Aspect Ratio Calculator

Calculate canvas dimensions while preserving a specific aspect ratio

FPS Converter

Convert between timecode, frames, seconds and milliseconds at any frame rate

Remove EXIF

Strip EXIF metadata from JPEG images — protect your privacy before sharing

Blur Image

Apply configurable Gaussian blur to images directly in your browser

Image to Base64

Convert images to Base64 data URIs for use in CSS or HTML

SERP Preview

Preview how your page title and meta description appear in Google results

Meta Tags Preview

Generate and preview HTML meta tags for SEO and social sharing

Open Graph Preview

Generate and preview Open Graph and Twitter Card meta tags

Robots.txt Generator

Build robots.txt files with crawl rules and sitemap references

Schema Generator

Generate JSON-LD structured data for Article, Product, FAQ and more

Regex Tester

Test regular expressions and highlight matches in real time

SQL Formatter

Format and beautify SQL queries with dialect support

Text Diff

Compare two texts and highlight line-by-line differences

Markdown Preview

Live preview with GitHub Flavored Markdown

Markdown to HTML

Convert Markdown to clean HTML markup

Text Case

Convert text between camelCase, snake_case, kebab-case and more

YAML Formatter

Format and validate YAML documents

Text Stats

Count words, characters, lines, sentences, and estimate reading time

Lorem Ipsum

Generate placeholder text by paragraphs, sentences or words

Cron Parser

Translate cron expressions into plain English

Number Base

Convert numbers between binary, octal, decimal and hexadecimal

Chmod Calculator

Calculate Unix file permissions in octal and symbolic notation

Sort Lines

Sort lines alphabetically, numerically, by length, or randomly

Remove Duplicates

Remove duplicate lines from text, case-sensitive or insensitive

HTML to Text

Strip HTML tags and extract clean plain text from markup

Add Line Numbers

Prefix every line in your text with sequential line numbers

Shuffle Lines

Randomly shuffle the order of lines in your text

Word Frequency

Count word occurrences and rank them by frequency

JS Minifier

Minify JavaScript source code

CSS Minifier

Minify and compress CSS stylesheets

JSON Minifier

Minify and prettify JSON documents