Best Free Online Developer Tools to Use in 2026
A practical, opinionated list of the best free online developer tools worth using in 2026, organized by category so you can find what you need fast.
Aug 08, 2026
Web Dev • HTML Entities
Browse HTML entities with a cleaner, faster interface
Explore symbols by category, jump into the most useful sets, and keep reserved characters easy to find.
Use search to narrow the cards below without leaving the page.
17
Categories
307
Entities
Why it helps
Keep reserved characters, symbols, and punctuation easy to discover when building content or documentation.
How to use
Open a category card to see every entity, then jump into the detail page for code examples and copy actions.
Built for speed
Cards are searchable instantly and work well on mobile, tablet, and desktop layouts.
Browse categories
Showing 17 of 17 categories.
Space Characters
Non-breaking spaces, en spaces, em spaces and other whitespace entities.
0
Entities
&
Core syntax
Special chars & HTML
Reserved characters for safe HTML output and markup handling.
13
Entities
A
Typography
Latin Letter
Letters and symbols commonly used in Latin alphabets.
67
Entities
˜
Accents
Diacritical marks
Accent marks and modifiers used in multilingual text.
8
Entities
Γ
Alphabet
Greek alphabet - Capital letters
Uppercase Greek symbols used in math, science, and notation.
24
Entities
γ
Alphabet
Greek alphabet - Small letters
Lowercase Greek symbols for formulas, constants, and text.
24
Entities
∑
Formula
Math Symbol
Operators and symbols used in equations, formulas, and algebra.
58
Entities
€
Finance
Currency Symbol
Common currency marks for finance, pricing, and localization.
5
Entities
“
Punctuation
Quotation Marks
Curly quotes, guillemets, and other punctuation variants.
12
Entities
¶
Writing
Punctuation Marks
Ellipsis, paragraph marks, and special punctuation symbols.
10
Entities
º
Formatting
Superscript
Raised characters used for notes, ordinals, and notation.
8
Entities
→
Navigation
Arrows
Directional symbols for flow, navigation, and mapping.
11
Entities
✦
Miscellaneous
Symbols, Dingbats
Decorative and technical glyphs used across interfaces.
10
Entities
Ⅳ
Numbers
Number Forms
Roman numerals and special number forms for typography.
10
Entities
ℝ
Math
Letterlike Symbols
Mathematical letter symbols for number sets and constants.
12
Entities
■
Shapes
Geometric Shapes
Squares, circles, diamonds and other shape symbols.
13
Entities
★
Icons
Miscellaneous Symbols
Stars, music notes, warning signs and cultural icons.
22
Entities
Last updated: 17 Aug 2026
Blog
Latest from Our Blog
How to Choose a Hash Algorithm for Data Security
A practical decision guide to choosing the right hash algorithm: MD5, SHA-1, SHA-2, SHA-3, bcrypt, argon2, PBKDF2, and SRI, with comparisons and clear recommendations.
Aug 08, 2026
CSS vs Tailwind CSS: Which One Should You Use?
A thorough, practical comparison of hand-written CSS and Tailwind CSS: learning curve, maintainability, performance, team workflows, and when each approach wins.
Aug 08, 2026
How to Optimize Core Web Vitals for Your Website
Learn practical, step-by-step techniques to improve LCP, INP, and CLS on your website. A developer-focused guide with real measurements and fixes.
Aug 08, 2026
How to Use Base64 Encoding in Real Projects
Learn practical, production-ready ways to use Base64 encoding: data URLs for images, JWT payloads, API tokens, and email attachments, with real code examples.
Aug 08, 2026
AES Encryption Explained: How It Works and Why It Matters
Learn how AES encryption works, the differences between AES-128, AES-192, and AES-256, and how to encrypt and decrypt data online.
Jun 23, 2026