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Developer Tools

60+ free browser-based utilities for developers, designers, freelancers, and business users. Instant, private, yours.

Looking for the Creatif Tools apps?

The Developer Tools below are the original DeskTools collection. The newer Creatif Tools apps for service businesses & resellers live in a separate section — 37 apps across 16 niches.

Formatters & validators

JSON, regex, base64, HTML entities, SQL — the formatting tools you reach for daily.

JSON
JSON Formatter
Format, validate, and minify JSON.
 RE
Regex Tester
Test regex patterns with live highlighting.
 B64
Base64 Encoder
Encode/decode Base64 strings.
 HE
HTML Entity Encoder
Encode/decode HTML entities.
 SQL
SQL Formatter
Format and beautify SQL queries.
 JSV
JSON Schema Validator
Validate JSON against a schema.
 C2J
CSV to JSON
Convert CSV to JSON objects.
 YJ
YAML ↔ JSON
Convert between YAML and JSON.

Generators & encoders

UUIDs, passwords, hashes, QR codes — generation tools.

UUID
UUID Generator
Generate UUIDs v1, v4, v7.
 PWD
Password Generator
Strong passwords with custom rules.
 HSH
Hash Generator
MD5, SHA-1, SHA-256, SHA-512.
 QR
QR Code Generator
Generate and download QR codes.
 LI
Lorem Ipsum Generator
Generate placeholder text.
 SLG
Slug Generator
Convert text to URL slugs.
 JWT
JWT Decoder
Decode and inspect JWT tokens.
 OTP
TOTP Generator
Generate time-based OTP codes.
 CSP
CSP Header Generator
Build Content-Security-Policy headers.
 MT
Meta Tag Generator
Generate meta tags for HTML pages.
 OG
Open Graph Previewer
Preview Open Graph tags in social.
 FV
Favicon Generator
Generate favicons from text or image.

Converters & calculators

Unit, color, time, image — conversion tools.

CLR
Color Picker
Pick colors, build palettes.
 WCAG
Contrast Checker
WCAG color contrast ratio.
 UNT
Unit Converter
Length, weight, temperature, etc.
 TS
Timestamp Converter
Unix timestamps to human dates.
 TZ
Time Zone Converter
Convert between time zones.
 BIN
Number Base Converter
Binary, octal, decimal, hex.
 IMG
Image to Base64
Convert images to Base64 strings.
 COMP
Image Compressor
Compress JPG/PNG/WebP images.
 AR
Aspect Ratio Calculator
Calculate aspect ratios.
 CHM
Chmod Calculator
Calculate file permissions.
 INV
Invoice Calculator
Build simple invoices.
 MTG
Meeting Cost Calculator
Calculate the real cost of meetings.
 POM
Pomodoro Timer
25/5 productivity timer.
 WCT
Word Counter
Count words, chars, sentences.

CSS & design

Gradient, shadow, clamp, font pairer — visual design tools.

GRD
CSS Gradient Generator
Build CSS gradients visually.
 BSH
Box Shadow Generator
Build CSS box-shadows visually.
 CLP
CSS Clamp Calculator
Generate clamp() values for fluid type.
 TW
Tailwind Colors
Browse the Tailwind color palette.
 SVG
SVG Optimizer
Minify and optimize SVG files.
 FNT
Font Pairer
Find good font combinations.

API & data

API testing, cron, JWT, env files — data tools.

API
API Tester
Test HTTP requests with custom headers.
 CRN
Cron Builder
Build cron expressions visually.
 J2T
JSON to Table
Convert JSON to HTML tables.
 J2C
JSON to CSV
Convert JSON arrays to CSV.
 MD
Markdown Preview
Live Markdown preview and export.
 M2H
Markdown to HTML
Convert Markdown to HTML.
 MDT
Markdown Table Generator
Build Markdown tables visually.
 DIF
Diff Checker
Compare two text blocks.
 URL
URL Encoder
Encode/decode URLs.
 ENC
Text Encryptor (AES-256)
Encrypt/decrypt text with AES-256.
 BCR
Bcrypt Generator
Hash passwords with bcrypt.
 CSE
Case Converter
camelCase, snake_case, kebab-case.
 TXT
Text Transformer
Sort, dedupe, trim, and more.
 EML
Email Subject Tester
Score your email subject lines.
 PSW
Password Strength Checker
Test password entropy and strength.
 SEC
Security.txt Generator
Build security.txt files.
 ENV
.ENV File Generator
Generate .env files with secrets.
 MIN
CSS Minifier
Minify and compress CSS.
 HTTP
HTTP Status Codes
Reference for all HTTP status codes.
 RXS
Regex Cheat Sheet
Quick regex reference.