ツール

整形。変換。生成。

データ、エンコード、セキュリティ、日々の開発作業に使える、高速でプライベートなブラウザー内ツールです。

DA

Data Tools 日本語カテゴリ

日本語の data ツールカテゴリ: Format, validate, and transform structured data.

Data Tools 日本語カテゴリ
JSON Formatter 日本語ツール日本語で使える json formatter ツール: Free online JSON formatter and validator with Monaco, JSONPath, TypeScript/YAML tools, diff, schema validation, tree view, and local processing.
jsonformattervalidator
Data Tools 日本語カテゴリ
JSON Schema Generator 日本語ツール日本語で使える json schema generator ツール: Generate JSON Schema from sample JSON and validate data locally with Draft 2020-12 or Draft 7.
json schema generatorgenerate json schema from jsonjson schema validator
Data Tools 日本語カテゴリ
SQL Formatter / SQL Beautifier 日本語ツール日本語で使える sql formatter ツール: Format, beautify, and minify SQL queries online with local processing and dialect options for generic SQL, MySQL, PostgreSQL, SQLite, and T-SQL.
sqlformatterminifier
Data Tools 日本語カテゴリ
CSV to JSON / JSON to CSV 日本語ツール日本語で使える csv json converter ツール: Convert CSV, TSV, and JSON locally with header controls, delimiter options, type inference, table preview, copy, and download.
csvjsoncsv to json
Data Tools 日本語カテゴリ
Text Diff Checker 日本語ツール日本語で使える text diff checker ツール: Compare two text blocks locally with side-by-side or unified diff, line and word highlighting, ignore whitespace/case, and change statistics.
text diffdiff checkercompare text
Data Tools 日本語カテゴリ
YAML Formatter / Validator 日本語ツール日本語で使える yaml formatter ツール: Format, validate, and convert YAML locally—Kubernetes, GitHub Actions, Docker Compose, JSON ↔ YAML, with line/column error hints.
yamlformattervalidator
Data Tools 日本語カテゴリ
XML Formatter / Validator 日本語ツール日本語で使える xml formatter ツール: Format, validate, and minify XML with Monaco editing—syntax highlighting, error line markers, Maven POM, Android manifests, SVG, and sitemaps.
xmlformattervalidator
Data Tools 日本語カテゴリ
UTC Timestamp Converter 日本語ツール日本語で使える timestamp converter ツール: Convert Unix and UTC timestamps to local time, ISO 8601, seconds, and milliseconds—and back. 100% local in your browser.
timestamputc timestamp converterunix timestamp converter
EN

Encoding Tools 日本語カテゴリ

日本語の encoding ツールカテゴリ: Encode and decode common developer formats.

Encoding Tools 日本語カテゴリ
Base64 Encoder / Decoder 日本語ツール日本語で使える base64 ツール: Encode and decode Base64 online—UTF-8, URL-safe, files, image paste, MIME wrap. 100% local.
base64encodedecode
Encoding Tools 日本語カテゴリ
URL Parser / Query Builder 日本語ツール日本語で使える url parser ツール: Parse URL parts, edit query parameters, and rebuild encoded URLs locally in your browser.
url parserquery string parserurl query builder
Encoding Tools 日本語カテゴリ
URL Encoder / Decoder 日本語ツール日本語で使える url encoder ツール: Encode and decode URLs, URI components, form values, and query strings locally in your browser.
urluriencode
GE

Generator Tools 日本語カテゴリ

日本語の generator ツールカテゴリ: Generate IDs, passwords, and useful development values.

Generator Tools 日本語カテゴリ
UUID Generator Online 日本語ツール日本語で使える uuid generator ツール: Generate random UUID v4 values online, copy batches, format IDs, and inspect existing UUIDs locally in your browser.
uuiduuid generatorguid generator
Generator Tools 日本語カテゴリ
Password Generator 日本語ツール日本語で使える password generator ツール: Generate strong passwords and memorable passphrases locally with length, character sets, batch copy, and strength guidance.
passwordgeneratorpassphrase
Generator Tools 日本語カテゴリ
QR Code Generator 日本語ツール日本語で使える qr code generator ツール: Generate QR codes from text or URLs locally in your browser. Choose size and error correction, then download PNG instantly.
qr codegeneratorurl
WE

Web Tools 日本語カテゴリ

日本語の web ツールカテゴリ: Inspect and prepare web content quickly.

Web Tools 日本語カテゴリ
Markdown Preview / Markdown to HTML 日本語ツール日本語で使える markdown preview ツール: Preview Markdown online with GitHub Flavored Markdown support, inspect headings and links, then copy or download sanitized HTML locally.
markdownmarkdown previewmarkdown to html
Web Tools 日本語カテゴリ
CSS Unit Converter / Clamp Generator 日本語ツール日本語で使える css unit converter ツール: Convert px, rem, em, %, vw, and vh with configurable context, then generate fluid clamp() CSS for typography and spacing.
css unit converterpx to remrem to px
Web Tools 日本語カテゴリ
cURL Converter 日本語ツール日本語で使える curl converter ツール: Convert common cURL commands to JavaScript fetch or Axios code locally without sending requests.
curl to fetchcurl to axioscurl converter
Web Tools 日本語カテゴリ
HTML Entity Encoder / Decoder 日本語ツール日本語で使える html entity encoder ツール: Encode and decode HTML entities locally—named, decimal, and hex forms, batch lines, and text preview for CMS and frontend work.
html entityencodedecode
Web Tools 日本語カテゴリ
Regex Tester 日本語ツール日本語で使える regex tester ツール: Test regular expressions online with live match highlighting, capture groups, flags, and replace preview—100% local in your browser.
regexregexpregular expression
Web Tools 日本語カテゴリ
Color Picker & Converter 日本語ツール日本語で使える color converter ツール: Convert colors between HEX, RGB, and HSL with live preview, WCAG contrast hints, copy buttons, and browser eyedropper support.
color pickerhexrgb
Web Tools 日本語カテゴリ
Cron Expression Parser Online 日本語ツール日本語で使える cron expression ツール: Parse cron expressions online into human-readable schedules, preview next run times locally, and build Unix crontab expressions.
croncron parsercron expression parser
SE

Security Tools 日本語カテゴリ

日本語の security ツールカテゴリ: Inspect tokens, hashes, and security-related formats.

Security Tools 日本語カテゴリ
JWT Decoder Online 日本語ツール日本語で使える jwt decoder ツール: Decode JWT tokens online and locally: view header, payload, exp/iat/nbf times, and signature limits without uploading tokens.
jwtjwt decodejwt decoder
Security Tools 日本語カテゴリ
Hash Generator 日本語ツール日本語で使える hash generator ツール: Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes and HMAC digests for text and files locally—batch mode included.
hashhmacmd5
AP

App Store Assets 日本語カテゴリ

日本語の app store assets ツールカテゴリ: Compose, resize, and prepare App Store and Google Play screenshots and listing assets locally.

App Store Assets 日本語カテゴリ
App Store Screenshot Composer 日本語ツール日本語で使える app store screenshot composer ツール: Turn raw app screenshots into polished App Store and Google Play marketing images with templates, copy, device frames, official presets, and local batch export.
app store screenshot generatorgoogle play screenshot makerapp store screenshot template
App Store Assets 日本語カテゴリ
App Market Image Resizer 日本語ツール日本語で使える app market image resizer ツール: Crop and resize App Store / Google Play screenshots, feature graphics, and icons to official sizes in your browser. Batch zip + upload checklist.
app store screenshot sizegoogle play feature graphic sizeapp store screenshot generator
App Store Assets 日本語カテゴリ
App Icon Set Generator 日本語ツール日本語で使える app icon generator ツール: Upload an existing logo, crop or pad it once, and export preset PNG icon sizes for iOS, Android, App Store, and Google Play. No AI generation.
app icon generatorapp icon resizerios app icon generator
IM

Image Tools 日本語カテゴリ

日本語の image ツールカテゴリ: Crop, resize, and optimize images locally for docs, apps, and the web.

Image Tools 日本語カテゴリ
Image Cropper / Screenshot Cropper 日本語ツール日本語で使える image cropper ツール: Crop images and screenshots online in your browser—fixed ratios, custom output sizes, PNG/JPEG/WebP export. 100% local, no upload.
image croppercrop image onlinecrop screenshot
Image Tools 日本語カテゴリ
Image Compressor / WebP Converter 日本語ツール日本語で使える image compressor ツール: Compress images and convert to WebP, JPEG, or PNG in your browser—quality slider, resize, batch zip. 100% local.
image compressorcompress image onlinewebp converter
Image Tools 日本語カテゴリ
Image Label Overlay / Brand Watermark Cover 日本語ツール日本語で使える image label overlay ツール: Cover image corners or bottom labels with draggable brand-style overlay templates. Add clean badges, glass plates, icon labels, or stickers locally in your browser.
image label overlaybrand watermark coveradd label to image
Image Tools 日本語カテゴリ
Responsive Image Generator 日本語ツール日本語で使える responsive image generator ツール: Generate multi-width WebP, JPEG, or PNG assets from one source image and copy srcset, picture, and Next.js Image snippets. 100% local.
srcset generatorresponsive image generatorpicture tag generator
Image Tools 日本語カテゴリ
Favicon / PWA Icon Generator 日本語ツール日本語で使える favicon generator ツール: Generate favicon, Apple touch icon, and PWA PNG icons from one logo. Zip download + HTML link and manifest snippets. 100% local.
favicon generatorpwa icon generatorapple touch icon generator
Image Tools 日本語カテゴリ
SVG Optimizer / Data URI Generator 日本語ツール日本語で使える svg optimizer ツール: Optimize SVG, detect risky markup, and copy URL-encoded or Base64 Data URI and CSS background snippets. 100% local.
svg optimizersvg minifiersvg data uri generator