必要なツールが、ぜんぶここに。
よく使う10個を、いつでも手元に。
PDF、画像、動画、音声、テキスト、コードのための無料オンラインツール。ほとんどがブラウザ内だけで動くので、ファイルが端末の外に出ることはありません。
私の10個
自分で選ぶまでは、よく使うツールが並びます。
人気のツール
Merge PDF
Combine multiple PDFs into one, in any order
Compress PDF
Shrink PDF file size while keeping it readable
PDF to Word
Turn PDFs into editable DOCX documents
Word, Excel & PowerPoint to PDF
Convert DOCX, XLSX and PPTX files to PDF
PDF ↔ JPG
Turn PDF pages into images, or images into a PDF
Edit & annotate PDF
Add text, highlights, shapes and drawings to a PDF
Image compressor
Shrink JPG, PNG, WebP and AVIF without visible loss
Image resizer
Resize by pixels, percent or preset — in bulk
HEIC, WebP & AVIF converter
Convert HEIC, WebP and AVIF to JPG or PNG — and back
Background remover
Remove image backgrounds with on-device AI
Passport photo maker
Passport, visa & ID photos in official sizes for 35+ countries
Image to text (OCR)
Extract text from images and screenshots
PDFツール
PDFの結合・分割・圧縮・変換・署名・編集をブラウザだけで。
Merge PDF
Combine multiple PDFs into one, in any order
Compress PDF
Shrink PDF file size while keeping it readable
PDF to Word
Turn PDFs into editable DOCX documents
Word, Excel & PowerPoint to PDF
Convert DOCX, XLSX and PPTX files to PDF
PDF ↔ JPG
Turn PDF pages into images, or images into a PDF
Split PDF
Split a PDF or extract the pages you need
Edit & annotate PDF
Add text, highlights, shapes and drawings to a PDF
Sign PDF
Draw, type or upload a signature and place it
Protect or unlock PDF
Add a password to a PDF, or remove one you know
OCR PDF
Make scanned PDFs searchable and selectable
PDF to text
Copy a PDF's text in reading order or save it as .txt
Extract images from PDF
Save the photos inside a PDF at full resolution
PDF to PowerPoint
Turn PDF pages into PowerPoint slides (PPTX)
Organize PDF
Reorder, rotate, delete and add pages in a PDF
Crop PDF
Trim PDF margins visually or to exact sizes
Add page numbers
Number PDF pages in 6 positions and any format
Watermark PDF
Stamp text or a logo on PDF pages
画像ツール
画像の圧縮・リサイズ・形式変換・補正を。AIモデルも端末上で動きます。
Image compressor
Shrink JPG, PNG, WebP and AVIF without visible loss
Image resizer
Resize by pixels, percent or preset — in bulk
HEIC, WebP & AVIF converter
Convert HEIC, WebP and AVIF to JPG or PNG — and back
SVG ↔ PNG converter
Render SVG to crisp PNG, or trace PNG into SVG
Crop, rotate & flip
Crop to any ratio, rotate and mirror images
Background remover
Remove image backgrounds with on-device AI
Image upscaler
Enlarge images 2×–4× with on-device AI
Passport photo maker
Passport, visa & ID photos in official sizes for 35+ countries
Image to text (OCR)
Extract text from images and screenshots
Face & text blur
Blur faces, plates and sensitive text automatically
Bulk watermark
Add text or logo watermarks to many images at once
EXIF viewer & remover
See photo metadata and GPS — then strip it
Screenshot beautifier
Gorgeous backgrounds, frames and device mockups
Meme generator
Caption images with classic or modern meme text
Favicon generator
ICO, PNG and manifest icons from an image, text or emoji
Color picker from image
Pick exact colors and extract a palette from any image
Photo & signature resizer
Exam-form photo and signature at exact pixels and KB
Collage maker
Grids, mosaics and freeform collages from up to 12 photos
Image splitter
Grids, strips, Instagram profile grids and carousel panoramas
Chart maker
Bar, line, pie and scatter charts from pasted data, as PNG or SVG
Photo editor
Adjust, black and white, sharpen, borders, circle crop and text
Logo to 3D
Extrude SVG and PNG logos into 3D renders, videos and STL files
動画・音声ツール
動画と音声の圧縮・変換・カット・文字起こし・録音をブラウザで。
Video compressor
Make videos smaller for email, WhatsApp and Discord
Video converter
Convert between MP4, WebM, MOV, MKV and more
Video trimmer
Cut the start and end of a video precisely
Video to GIF
Turn video clips into looping GIFs
Audio converter
Convert MP3, WAV, M4A, OGG, FLAC and more
Audio cutter & ringtone maker
Trim songs and make ringtones for iPhone and Android
Subtitle generator
Auto-generate SRT and VTT subtitles with on-device AI
Audio & video transcription
Transcribe speech to text privately, in 90+ languages
Text to speech
Read text aloud with natural voices
Screen recorder
Record your screen, tab or window with audio
Voice recorder
Record audio from your microphone and save it
Mute video
Take out, turn down or silence part of a video's sound
Resize video
Reframe videos as 9:16, 1:1, 4:5 or 16:9 for social apps
Add subtitles to video
Burn SRT/VTT captions in, or add them as a track
Vocal remover
Split songs into vocals and instrumental with on-device AI
ファイル・デバイスツール
圧縮ファイルの展開、表データの変換、カメラ・マイク・キーボード・画面のチェック。
ZIP & RAR extractor
Open ZIP, RAR, 7Z and TAR archives in your browser
CSV ↔ Excel ↔ JSON
Convert spreadsheets between CSV, XLSX and JSON
Webcam & microphone test
Check your camera and mic before a call
Keyboard tester
Test every key, ghosting and rollover
Black screen
True black full screen for OLED, bleed checks and sleep
White screen
Pure white full screen with dimmer and sleep timer
Dead pixel test
Find, mark and report dead or stuck pixels
Ring light
Screen light with color temperature for calls
Color screen
Any solid color full screen, or as an image
Monitor test
Banding, levels, sharpness and motion test patterns
Split CSV or Excel
Split big CSV and Excel files by rows, parts or column
XML converter
XML to JSON, CSV and Excel, and back to XML
テキストツール
文字数カウント、変換、比較、整形、文字装飾。
Word counter
Count words, characters, sentences and reading time
Social character counter
Check post length for X, Instagram, LinkedIn and more
Case converter
UPPER, lower, Title, Sentence, camelCase and more
Citation generator
APA, MLA and Chicago citations — look up by DOI or ISBN
Readability checker
Flesch, Gunning Fog and grade-level scores
Text diff checker
Compare two texts and highlight the differences
Sort lines & remove duplicates
Sort, dedupe, shuffle, trim and clean up lists
Fancy font generator
Stylish Unicode text for bios, posts and names
Symbols & emoji
Search and copy emoji, arrows, stars and special characters
Lorem ipsum generator
Placeholder paragraphs, sentences, words and lists
Username generator
Unique usernames for games, socials and accounts
Uzbek alphabet converter
Kirill, Lotin and the 2026 alphabet, in text and Word files
Cyrillic to Latin
Russian, Ukrainian, Bulgarian, Serbian · passport rules
Simplified ↔ Traditional Chinese
简体 ↔ 繁體 for Taiwan or Hong Kong, text and Word files
Number to words
Numbers and amounts in words, in 23 languages
ローマ字変換
漢字・かなをローマ字に、パスポート表記にも対応
全角・半角変換
全角⇔半角、ひらがな⇔カタカナ、振込名義
Keyboard layout converter
ghbdtn → привет, dkssud → 안녕: undo the wrong layout
Paraphrasing tool
Reword text in five modes: fluent, formal, simple, shorter
Text summarizer
Bullet points or a paragraph, from short to detailed
Grammar checker
Corrections marked in your text, each one explained
Essay writer
Model essays to learn structure from, with evidence placeholders
Paragraph generator
One to three paragraphs on any topic, in your tone
Email writer
New emails, replies and follow-ups, with subject lines
Instagram caption generator
Five captions with hashtags for any post
Headline generator
Ten titles for posts, videos, ads and emails
Meta description generator
Five SEO snippets with length checks and the HTML tag
Story generator
Original short stories from your idea, for any age
計算ツール
お金・健康・日付・学校・日常の計算を、計算式つきで。
Loan & mortgage calculator
Monthly payment, total interest and amortization
Compound interest calculator
See how savings and investments grow over time
Salary to hourly converter
Convert between hourly, daily, weekly, monthly and yearly pay
Pregnancy due date calculator
Estimate due date, trimester and milestones
BMI, calorie & TDEE calculator
Body mass index, daily calories and macros
Age calculator
Exact age in years, months, days — and next birthday
Days between dates & countdown
Count days, business days and countdown to events
GPA calculator
Semester and cumulative GPA on 4.0 and other scales
Tip & bill splitter
Calculate tips and split the bill fairly
Fuel cost & trip calculator
Trip fuel cost in any unit and currency
Percentage calculator
X% of Y, percent change, increase and decrease
Time zone converter
Compare times across cities and plan meetings
Unit converter
Length, weight, temperature, volume, speed and more
Scientific calculator
Trig, logs, powers, memory and history
Random number generator
Random numbers, dice, coin flips and lists
Calendar converter
Hijri, Persian, Japanese era, lunar and 9 more calendars
VAT calculator
Add or remove VAT with the rates of 79 countries
開発者ツール
開発者向けの整形・エンコード・生成ツールとWebチェッカー。
JSON formatter & validator
Beautify, minify and validate JSON with error hints
JSON to types
Generate types and data classes from JSON samples
Regex tester
Test regular expressions with live matches and explanations
Base64 & URL encoder
Encode and decode Base64, URL and HTML entities
JWT decoder
Decode and inspect JSON Web Tokens, verify signatures
Hash generator
MD5, SHA-1, SHA-256, SHA-512 for text and files
UUID generator
UUID v4, v7 and v1 in bulk, plus ULID and Nano ID
Password generator
Strong passwords and passphrases, with strength check
Cron expression builder
Build, explain and preview cron schedules
Unix timestamp converter
Epoch time to date and back, in any time zone
SQL formatter
Beautify SQL for MySQL, PostgreSQL, SQL Server and more
CSS gradient & shadow generator
Design gradients and box shadows visually
Color palette & contrast checker
Palettes, shades, WCAG contrast and color-blind checks
App icon generator
Every iOS, Android and PWA icon size from one image
Privacy policy & terms generator
Privacy policy, terms and cookie policy drafts
Mock REST API
Fake JSON endpoints with fake data, delays and CORS
Website speed & SEO checker
On-page SEO audit with Core Web Vitals and fixes
Open Graph & meta tag previewer
Preview links on Google, Facebook, X, LinkedIn and Slack
Robots.txt & sitemap generator
robots.txt builder and tester, XML sitemaps
What's my IP & DNS lookup
Your public IP address and DNS records for any domain
ID number checker & generator
Validate and generate CPF, CURP, DNI, PESEL and 21 more ID numbers
ビジネス・仕事効率化ツール
請求書、履歴書、QRコード、短縮URL、監視、集中のためのツール。
Invoice generator
Professional invoices as PDF in any currency
Resume builder
ATS-friendly resumes with live preview
QR code generator
Styled QR codes for links, Wi-Fi, vCards and more
Barcode generator
EAN, UPC, Code 128, Data Matrix and more
Email signature generator
Polished signatures for Gmail, Outlook and Apple Mail
Business name generator
Brandable names with instant domain availability
Social media image resizer
Perfect sizes for Instagram, YouTube, LinkedIn and more
Link shortener
Short links with QR codes and click statistics
Uptime monitor
Know when your website goes down
Online notepad & whiteboard
Quick notes and a sketch board that save automatically
Wheel spinner & random picker
Spin the wheel to pick a winner or make decisions
Typing speed test
Measure your WPM and accuracy
Timer, stopwatch & Pomodoro
Countdown timer, stopwatch with laps and focus sessions
Typing tutor
Touch-typing lessons with an on-screen keyboard and hands
郵便番号検索
住所⇔郵便番号、かな入力・英語表記つき
プライバシー重視の設計
ほとんどのツールは WebAssembly と端末上の AI でブラウザ内だけで動作します。ファイルが当社のサーバーに届くことはありません。
速くて無料
順番待ちも、アップロードも、待ち時間もありません。必要な機能はすべて無料。重い作業には Pro で上限を外せます。
登録不要
ツールを開いてすぐ使えます。アカウントもメールアドレスも不要、結果に透かしも入りません。