DevTools24

Your collection of free developer tools

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SQL to TS types

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JSON was derived from JavaScript but is language-independent. It was specified by Douglas Crockford in 2001.

Generate unique identifiers

Encode & decode Base64

Escape special characters

URL encode & decode

Format & validate JSON

Minify HTML & CSS

Test regex patterns

Generate color palettes

Convert units

Generate secure passwords

Generate hash values

Decode JWT tokens

Look up MIME types

Convert dates & timestamps

Convert color formats

View OpenAPI specs

Compare text differences

Build cron expressions

Convert JSON to YAML and back

Convert JSON to CSV and back

Convert JSON to XML and back

Generate placeholder text

Count words & characters

Convert text case formats

Sort & manipulate lines

Generate QR codes

Write Markdown with preview

Convert images to Base64

Format SQL queries

Format JS/TS code

Convert number bases

Generate CSS gradients

Generate CSS box shadows

Test JSONPath expressions

Convert HTML & Markdown

Create URL-friendly slugs

HTTP status codes reference

Convert binary & text

Unicode character lookup

Create robots.txt files

Generate SEO meta tags

Format TOML files

Parse user agent strings

Convert Punycode/Unicode

Build CORS headers

Create Markdown tables

Edit .env files

Generate fake test data

Generate placeholder images

Calculate file checksums

Calculate IP subnets

Build package.json files

Build Dockerfiles

Decode SAML & OAuth

Decode X.509 certificates

Generate SSH keys

Compress images

Resize images

Optimize SVG files

Create sprite sheets

Generate favicons

Screenshot code snippets

Visual Markdown editor

Convert Unix timestamps

Convert naming conventions

Hex/binary/octal converter

ASCII character reference

IP subnet calculator

Generate .gitignore files

Generate license files

Build GitHub workflows

Generate nginx configs

Generate TS from JSON

Generate JSON Schema

Convert CSV to SQL

Convert JSON to CSV

Build GraphQL schemas

Compare .env files

Build CSP headers

Create & sign JWTs

Generate TOTP codes

Generate API keys

View image EXIF data

Read QR codes

Build PostgreSQL JSONB queries

Unix permissions calculator

Convert KB, MB, GB, TB

Test XPath queries

Convert SVG to PNG

Compare JSON objects

Convert cURL to code

Encode/decode HTML entities

Parse URL components

Analyze password security

View & filter CSV data

Build URL query strings

Validate UUID versions

Generate HMAC signatures

Create ASCII art text

Calculate percentages

Binary bitwise operations

Create data: URLs

Compare version numbers

Regex pattern reference

Explain cron expressions

Parse HTTP headers

Blend colors together

Minify JS/CSS/HTML

Convert TSV to CSV

Convert INI to JSON

Compare strings with hash

Compare text changes

Analyze CSP security

Convert .properties to YAML

Generate bcrypt hashes

Convert timezones

Test JSONPath queries

Format JavaScript code

Check WCAG contrast

Calculate aspect ratios

Extract image colors

AES encryption tool

Encode/decode Base32

Identify hash algorithms

ROT13/Caesar cipher

Days between dates

Calculate age from date

Business days counter

Find keyboard codes

Convert CSS units

Format & validate XML

Strip HTML tags

Escape regex chars

Generate Go structs

Generate Rust structs

Validate YAML syntax

Generate K8s manifests

Placeholder images

Debug OG meta tags

Generate IAM policies

Markdown to email HTML

Build CSS flexbox layouts

Build CSS Grid layouts

Create CSS animations

Generate Git commands

Generate Zod schemas

Build docker-compose files

Build regex visually

Generate package.json

Generate tsconfig.json

Build MongoDB queries

Build SQL queries

Build Redis commands

Detect leaked secrets

Format stack traces

Generate Makefiles

Convert Tailwind to CSS

Generate .env templates

Edit SVG paths

Generate CSS clip-paths

Generate SVG waves

Generate font scales

Generate CSS filters

Generate border radius

Generate CSS patterns

Common regex patterns

Generate mock JSON

Build webhook payloads

OpenAPI to TS types

Generate Prisma schemas

SQL to TS types

GraphQL to TS types

Timezone overlap finder

Keyboard shortcut reference

Git command reference

HTTP headers reference

Excel/Sheets formulas

Convert to WebP

Simulate color blindness

Remove image metadata

Add watermarks to images

All tools are free, secure, and run entirely in your browser

DevTools24

SQL to TypeScript

GUID Generator

Base64 Encoder/Decoder

String Escaper/Unescaper

URL Encoder/Decoder

JSON Formatter & Validator

HTML/CSS Minifier

Regex Tester & Debugger

Color Palette Generator

Unit Converter

Password Generator

Hash Generator

JWT Token Viewer

MIME Type Converter

Timestamp-DateTime Converter

Color Format Converter

OpenAPI/Swagger Viewer

Diff Viewer

Cron Expression Generator & Parser

JSON ↔ YAML Converter

JSON ↔ CSV Converter

JSON ↔ XML Converter

Lorem Ipsum Generator

Word Counter

Case Converter

Line Sorter & Deduplicator

QR Code Generator

Markdown Editor

Image to Base64

SQL Formatter

JavaScript Beautifier

Number Base Converter

CSS Gradient Generator

CSS Box Shadow Generator

JSONPath Tester

HTML ↔ Markdown Converter

Slug Generator

HTTP Status Codes Reference

Binary/Text Converter

Unicode Character Lookup

robots.txt Generator

Meta Tag Generator

TOML Formatter

User Agent Parser

Punycode Converter

CORS Headers Builder

Markdown Table Generator

.env Editor

Fake Data Generator

Placeholder Image Generator

Checksum Calculator

Subnet Calculator

package.json Builder

Dockerfile Builder

SAML/OAuth Decoder

Certificate Decoder

SSH Key Generator

Image Compressor

Image Resizer

SVG Optimizer

Sprite Sheet Generator

Favicon Generator

Code Screenshot Generator

WYSIWYG Markdown Editor

Epoch Converter

Casing Converter

Number Systems Calculator

ASCII Table

CIDR Calculator

.gitignore Generator

LICENSE Generator

GitHub Actions Builder

nginx Config Generator

JSON to TypeScript

JSON Schema Generator

CSV to SQL Converter

JSON to CSV Converter

GraphQL Schema Builder

Environment Diff