모든 가이드
무료 온라인 도구를 최대한 활용할 수 있는 50개 가이드 — 단계별 튜토리얼, 심층 설명, 비교 및 팁.
How to Encode and Decode Base64 — 완전 가이드
Learn what Base64 encoding is, how it works, when to use it, and how to encode and decode Base64 in your browser —no tools or signup needed.
comparisonBase64 vs Hex 인코딩: 어느 것을 사용해야 할까?
Compare Base64 and Hex encoding across efficiency, readability, use cases, and trade-offs — and learn when to pick each for binary-to-text encoding.
explanation색상 형식 설명: HEX, RGB, HSL
Understand the three most common web color formats —HEX, RGB, and HSL —how each represents color, when to use which, and how to convert between them.
comparisonCSV vs TSV: 어느 구분자 형식을 사용해야 할까?
Compare CSV and TSV across delimiter choice, escaping, compatibility, and use cases — and learn when to pick each for tabular data.
referenceDNS 레코드 설명: A, AAAA, MX, TXT, CNAME, NS
A complete reference guide to DNS record types —A, AAAA, MX, TXT, CNAME, and NS —with examples, use cases, and how to look them up.
explanation해시 알고리즘 설명: MD5, SHA-1, SHA-256, SHA-512
Understand cryptographic hash functions: differences between MD5, SHA-1, SHA-256, and SHA-512, and which to use for integrity checks vs password storage.
how-to사용법 Compress Images Without Losing Quality
Step-by-step guide to compressing images (JPEG, PNG, WebP) to reduce file size without visible quality loss using a free browser-based tool.
how-to사용법 Compress PDF Files Step by Step
Step-by-step guide to compressing PDF files to reduce file size using a free browser-based tool. Learn compression levels and what affects PDF size.
how-to사용법 Convert Colors Between HEX, RGB, and HSL
Step-by-step guide to converting colors between HEX, RGB, HSL, and other formats using a free browser-based tool. Learn when to use each format.
how-to사용법 Convert CSV to JSON Step by Step
Step-by-step guide to converting CSV data to JSON using a free browser-based tool. Learn header handling, nested structures, and common pitfalls.
how-to사용법 Convert Markdown to HTML Step by Step
Step-by-step guide to converting Markdown text to HTML using a free browser-based tool. Learn syntax, extensions, and common use cases.
how-to사용법 Convert Text to Binary and Back Step by Step
Step-by-step guide to converting text to binary (0s and 1s) and decoding binary back to text using a free browser-based tool. Learn ASCII and UTF-8.
how-to사용법 Convert Unix Timestamps to Human-Readable Dates (Step-by-Step)
Step-by-step guide to converting Unix timestamps (epoch) to human-readable dates and back using a free browser-based tool. Learn seconds vs milliseconds.
how-to사용법 Decode JWT Tokens and Inspect Claims Safely
Step-by-step guide to decoding JWT (JSON Web Token) tokens and inspecting their header and payload claims using a free browser-based tool. Learn security boundaries.
how-to사용법 Encode and Decode Base64 Strings Step by Step
Step-by-step guide to encoding text to Base64 and decoding Base64 back to text using a free browser-based tool. No upload, no signup, fully private.
how-to사용법 Encode and Decode URLs Step by Step
Step-by-step guide to URL encoding (percent-encoding) and decoding using a free browser-based tool. Learn why and when to encode URLs.
how-to사용법 Extract Text from PDF Files Step by Step
Step-by-step guide to extracting text content from a PDF file using a free browser-based tool. Learn scanned vs digital PDFs.
how-to사용법 Format and Validate JSON Data Step by Step
Step-by-step guide to formatting (beautifying) and validating JSON data using a free browser-based tool. Catch syntax errors, minify, and pretty-print JSON instantly.
how-to사용법 Generate Hash Values Step by Step
Step-by-step guide to generating cryptographic hash values (SHA-256, SHA-1, MD5) using a free browser-based tool. Learn use cases and security tradeoffs.
how-to사용법 Generate Secure Passwords Step by Step
Step-by-step guide to generating strong, random passwords using a free browser-based tool. Learn password length, character sets, and security best practices.
how-to사용법 Generate UUIDs Step by Step
Step-by-step guide to generating UUIDs (Universally Unique Identifiers) using a free browser-based tool. Learn UUID v4, v1, and when to use each.
how-to사용법 Merge PDF Files Step by Step
Step-by-step guide to merging (combining) multiple PDF files into one using a free browser-based tool. Learn ordering and page ranges.
how-to사용법 Resize Images Step by Step
Step-by-step guide to resizing images (change width and height) using a free browser-based tool. Learn aspect ratio, upscaling, and common dimensions.
how-to사용법 Split PDF Files Step by Step
Step-by-step guide to splitting a PDF file into multiple parts or extracting specific pages using a free browser-based tool.
how-to사용법 Test Regular Expressions Step by Step
Step-by-step guide to testing and debugging regular expressions using a free browser-based tool. Learn flags, capture groups, and common patterns.
how-to사용법 Use a Color Picker to Find Colors from Any Pixel
Step-by-step guide to using a color picker to find the exact color (HEX, RGB, HSL) of any pixel in an image or on screen using a free browser-based tool.
explanationJSON 포맷팅 모범 사례: 읽기 쉽고, 유효하고, 효율적인
Understand the conventions for formatting JSON: indentation, key ordering, minification, trailing commas, and when to pretty-print vs minify.
explanationJSON 이해: 포맷팅과 검증 초보자 가이드
Learn what JSON is, its syntax rules, common data types, and how to format and validate JSON data using free online tools.
comparisonJSON vs XML: 어느 데이터 형식을 사용해야 할까?
Compare JSON and XML across syntax, verbosity, parsing speed, ecosystem support, and use cases — and learn when to pick each.
comparisonJSON vs YAML: 어느 구성 형식을 사용해야 할까?
Compare JSON and YAML across readability, features, use cases, and trade-offs — and learn when to pick each for configuration and data interchange.
how-to사용법 Decode a JWT and Inspect Its Claims Safely
Learn the three-part structure of a JSON Web Token, how to decode the header and payload without verifying, and why decoding is not the same as trusting.
comparisonMarkdown vs HTML: 콘텐츠에 어느 것을 사용해야 할까?
Compare Markdown and HTML across readability, expressiveness, learning curve, use cases, and rendering —and learn when to pick each (or both).
problem-solving비밀번호 보안: 강력한 비밀번호 생성, 저장 및 감사 방법
Solve the most common password security problems: generating strong passwords, hashing them correctly, avoiding reuse, and auditing existing credentials.
comparisonPDF 압축기 vs 이미지 압축기: 어느 것이 필요한가?
Compare PDF and Image compression across targets, techniques, quality trade-offs, and use cases — and learn which tool to use for your file size problem.
reference정규 표현식 치트 시트: 구문, 플래그, 일반 패턴
Complete regex reference: metacharacters, character classes, quantifiers, anchors, groups, flags, and ready-to-use patterns for emails, URLs, and dates.
how-to사용법 Convert Unix Timestamps to Human-Readable Dates
Learn what a Unix timestamp is, how to convert it to a human-readable date and back, and how to handle time zones correctly when working with epoch time.
reference단위 변환 참조: 길이, 질량, 온도, 면적
A complete reference of conversion factors for length, mass/weight, temperature, and area, with exact formulas and worked examples for each.
how-toHow to Encode and Decode URLs — 완전 가이드
Learn what URL encoding (percent-encoding) is, why it is required, and how to encode and decode URLs in your browser —no signup, fully private.
comparisonUUID v1 vs v4 vs v5: 어느 버전을 사용해야 할까?
Compare UUID versions 1, 4, and 5: how each is generated, their trade-offs in uniqueness, ordering, and determinism, and which to pick for your use case.
explanationBase64 인코딩이란? 완전한 설명
A clear explanation of what Base64 encoding is, how it works, its character set, and why it is not encryption.
explanationCSV란? 쉼표로 구분된 값의 완전한 설명
A clear explanation of what CSV (Comma-Separated Values) is, its syntax rules, common variations, and when to use CSV vs JSON.
explanation해싱이란? 해시 함수의 완전한 설명
A clear explanation of what hashing is, properties of cryptographic hash functions, common algorithms (SHA-256, MD5), and use cases.
explanationJSON이란? JavaScript 객체 표기법의 완전한 설명
A clear explanation of what JSON (JavaScript Object Notation) is, its syntax, data types, history, and why it replaced XML as the web's data format.
explanationJWT란? JSON 웹 토큰의 완전한 설명
A clear explanation of what a JWT (JSON Web Token) is, its three-part structure, how it is used for authentication, and security considerations.
explanationMarkdown란? 경량 마크업 언어의 완전한 설명
A clear explanation of what Markdown is, its syntax, why it is popular for documentation, and how it converts to HTML.
explanation정규 표현식이란? 완전한 설명
A clear explanation of what a regular expression (regex) is, its syntax, common use cases, and why regex is powerful but hard to read.
explanationUnix 타임스탬프란? 에포크 시간의 완전한 설명
A clear explanation of what a Unix timestamp is, the Unix epoch, seconds vs milliseconds, and the Year 2038 problem.
explanationURL 인코딩이란? 퍼센트 인코딩의 완전한 설명
A clear explanation of what URL encoding (percent-encoding) is, which characters need encoding, and how it works.
explanationUUID란? 범용 고유 식별자의 완전한 설명
A clear explanation of what a UUID is, its versions (v1, v4, v5), structure, collision probability, and when to use UUIDs.
how-to사용법 Count Words, Characters, and Reading Time Accurately
Learn how word and character counts are defined across languages, how to estimate reading time, and how to use a counter to hit limits for essays, tweets, and meta descriptions.