無料オンラインツール
個人の仕事を支える実用的なツール。登録不要。 ビジネス, 請求書, 販売者, PDF, 画像, テキスト, 開発, メール
プロジェクト見積もり
Price your time and direct costs.
プロジェクト利益計算
Measure profit after labor and fees.
フリーランス時給計算
Plan a rate from annual income and billable time.
損益分岐点計算
Find the sales volume needed to cover fixed costs.
割引計算
Calculate sale prices and savings.
EC利益計算
Include shipping, platform fees, advertising and refunds.
プラットフォーム手数料計算
Estimate fees using your own platform rates.
広告ROAS計算
Compare attributed revenue with advertising spend.
送料配分計算
Allocate shipment cost by total item weight.
支払期日計算
Calculate a due date from invoice terms.
見積書PDF作成
Create a document and print or save it as PDF.
請求書作成
Create a document and print or save it as PDF.
領収書作成
Create a document and print or save it as PDF.
単語数と文字数カウント
Count text length and reading time.
大文字・小文字変換
Convert text to upper, lower, title or sentence case.
重複行の削除
Keep the first occurrence of each exact line.
テキスト行比較
Compare exact lines in two texts; order changes appear as differences.
JSON整形
Validate and pretty-print JSON.
タイムスタンプ変換
Convert Unix seconds or milliseconds to UTC and local time.
URLエンコード・デコード
Encode or decode a URL component.
正規表現テスト
Test JavaScript patterns in an isolated worker.
メール件名チェック
Check subject length without claiming deliverability.
メールリンク作成
Build and preview a mailto link with recipients, subject and body.
メール署名作成
Preview a signature and copy it into your mail settings.
サンプルメールアドレス生成
Generate sample email addresses from random names or a TXT username list.
メールアドレス抽出・グループ分け
Extract email addresses from text or HTML and group by size or domain.
コード整形
Format JavaScript, CSS, HTML, XML and SQL in your browser.
画像・Base64変換
Convert image files to Base64 and decode Base64 image data.
SVGから画像へ
Convert SVG files or source to PNG, JPG and WebP.
Markdown変換
Edit and preview Markdown, or convert HTML to Markdown.
画像圧縮
Process JPEG, PNG and WebP images locally, including batches.
画像サイズ変更
Process JPEG, PNG and WebP images locally, including batches.
画像形式変換
Process JPEG, PNG and WebP images locally, including batches.
画像透かし
Process JPEG, PNG and WebP images locally, including batches.
画像をPDFに変換
Files are processed in your browser. Encrypted PDFs are not supported.
PDF結合
Files are processed in your browser. Encrypted PDFs are not supported.
PDFページ抽出
Files are processed in your browser. Encrypted PDFs are not supported.
PDFページ並べ替え
Files are processed in your browser. Encrypted PDFs are not supported.
メールアドレス検証
Check syntax, duplicates and common domain spelling mistakes in email lists.
メールヘッダー解析
Inspect routing, authentication results and visible privacy details from raw email headers.
配信エラー解析
Explain common SMTP and enhanced delivery status codes in bounce messages.
メール内容チェック
Review subject length, links, image descriptions and common promotional wording.
DNSと認証
Query MX, SPF, DKIM and DMARC; draft SPF and DMARC records.
プライバシーとリンク検査
Mask email addresses and inspect URL structure without opening links.
メールリスト演算
Merge lists, calculate intersections and differences, and export domain statistics.
ファイル内メール検索
Extract unique addresses from pasted content or local TXT, CSV, HTML and EML files.
メールテンプレート作成
Create an HTML email and a plain-text version from editable message fields.
HTMLメールとCSSインライン化
Preview HTML email, inline static CSS at a selected width and inspect compatibility risks.