Batch compress, convert format, or resize multiple images at once.

Capture screenshots and convert them to PNG format instantly. Free online screenshot to PNG tool for saving screen captures.

Generate favicon icons from images in multiple sizes. Free online favicon generator for websites and web apps.

Generate placeholder images for web design mockups and prototypes. Free online image placeholder generator with custom sizes.

テキストやURLからQRコードを生成する無料オンラインツール。

Crop photos to standard ID sizes like passport, 1-inch, and 2-inch. Free online ID photo cropper for documents in your browser.

ライブハイライト付きで正規表現をテスト・デバッグする無料オンラインツール。

2つのテキストを比較し、行単位で違いをハイライトする無料オンラインツール。

Cron式を人間が読める時間形式に解析する無料オンラインツール。

HTTPリクエストを構築・テストする無料オンラインツール。

CSVファイルをソート・フィルタリング付きテーブルで表示する無料オンラインツール。

Detect the technology stack of any website — frameworks, CMS, CDN, analytics, hosting, and more. Supports batch comparison of multiple sites.

Convert text to ASCII art banners and figlet fonts. Free online ASCII art generator for social media and terminal fun.

Analyze text readability with Flesch-Kincaid, Gunning Fog, and other scores. Get word count, sentence length stats, and grade-level estimates.

Markdownを即座にHTMLに変換する無料オンラインツール。

テキストをURL互換のスラッグに変換する無料オンラインツール。

Find anagrams for any word or set of letters. Free online tool to discover word combinations in your browser.

Scramble and rearrange letters in words randomly. Free online tool to create word puzzles in your browser.

MD5、SHA1、SHA256などのハッシュを生成する無料オンラインツール。ブラウザ内で実行されます。

Generate MD5, SHA-256, and other file checksums instantly. Free online tool to verify file integrity in your browser.

Generate WiFi QR codes for easy network sharing with guests. Free online WiFi QR code generator for cafes and offices.

Validate credit card numbers using Luhn algorithm and detect card type. Free online credit card checker for payment testing.

Validate IBAN account numbers and check formatting for international transfers. Free online IBAN checker for banking verification.

Generate RSA public and private key pairs for encryption. Free online RSA key generator for secure communication.

Generate powerful AI prompts for ChatGPT, Midjourney, and more.

Summarize long text into concise key points instantly.

Explain what your code does in plain language. Free online tool to understand any codebase in your browser.

Translate text between languages with AI-powered accuracy.

Compare pricing across popular AI tools side by side. Free online tool to find the best value AI services for your budget.

Find the right AI tool for your task from hundreds of options. Free online AI tool directory for productivity and automation.

Audit multiple URLs for SEO at once. Check title length, meta description, headings, Open Graph tags, and get a comparison scorecard.

Build campaign tracking URLs with UTM parameters for Google Analytics. Generate ready-to-use links for marketing campaigns.

Find free alternatives for SEO analysis and backlink research. Compare features and choose the best online SEO tool for your site.

Check GDPR cookie compliance for your website. Free online tool to audit consent banners in your browser.

Check your visibility in AI-powered search results.

Validate sitemap XML structure, check URLs, detect errors, and analyze URL statistics — 100% local.

Browser-based video editor with basic trim, cut, and merge functions.

Merge multiple video clips into one file. Free online tool to join and concatenate videos in your browser.

Trim video to remove unwanted start and end sections.

Add background music or voiceover to your video. Free online tool to enhance video sound in your browser.

Overlay text, titles, and captions on video frames.

Crop video to a specific aspect ratio or region. Free online tool to frame your footage in your browser.

Extract audio tracks from MP4 video files to MP3. Free online tool to convert media in your browser with no upload.

Trim audio files to remove unwanted sections. Free online tool to cut and edit sound in your browser instantly.

Adjust, normalize, or boost audio volume levels. Free online tool to fix quiet recordings directly in your browser.

Change audio playback speed without pitch shift. Free online tool to speed up or slow down sound in browser.

Shift audio pitch up or down without changing tempo. Free online audio pitch shifter for music and voice editing in your browser.

Adjust bass, mid, and treble frequencies for audio. Free online tool to enhance sound quality in your browser.

Create structured drafts for articles, posts, product pages, and marketing copy.

Generate SEO-friendly titles, headlines, and social hooks from a topic.

Generate clear paragraphs from a topic, keywords, and tone.

Draft professional emails for outreach, replies, follow-ups, and support.

Rewrite AI-like text into a more natural, human, readable style.

Find common grammar, punctuation, casing, and readability issues.

Count X/Twitter characters and check post length instantly.

Generate short bios for Instagram, X, TikTok, LinkedIn, and creators.

Plan and optimize cross-platform content distribution. Select platforms, schedule posts, and track performance — free online tool.

Paste a URL to extract the article content, metadata, and images. Export as clean Markdown, HTML, or structured data — 100% local.

Create a clean resume draft from your role, experience, skills, and education.

Generate a tailored cover letter for a role, company, and background.

Draft job descriptions with responsibilities, requirements, and benefits.

Create structured meeting agendas with goals, topics, owners, and timing.

Turn discussion notes into concise meeting minutes and action items.

Generate a project brief with goals, scope, timeline, stakeholders, and risks.

Convert Markdown text to PDF document. Supports headings, lists, code blocks, tables, bold/italic, links, and more. Uses jsPDF for rendering.

Convert PDF documents to editable Word format. Free online tool to extract and edit text in your browser.

Extract tables from PDF into Excel spreadsheets. Free online tool to convert data for analysis in your browser.

Convert PDF pages to editable PowerPoint slides instantly. Free online tool to transform presentations in your browser.

Convert PDF content into clean, editable HTML markup. Free online tool to repurpose documents for the web in your browser.

Convert Word documents to PDF format for sharing and printing. Free online Word to PDF converter with no uploads.

数字をローマ数字に変換・逆変換する無料オンラインツール。

Calculate statistical significance, confidence intervals, and lift for your A/B test results. Determine if your experiment has a winner.

Calculate ad spend, clicks, revenue, profit, ROAS, and ROI.

Calculate gross profit, markup, and margin from cost and price.

Calculate sale price, discount amount, and savings percentage.

Calculate how many units you need to sell to break even.

Convert Excel spreadsheets to CSV format for data export. Free online Excel to CSV converter for spreadsheet migration.

Convert CSV files to Excel spreadsheet format. Free online tool to transform tabular data in your browser with one click.

Create bar, line, pie, and doughnut charts from CSV data instantly. Paste or upload your CSV and customize colors, labels, and chart types. Runs 100% locally.

Summarize tabular data with pivot table dimensions and metrics.

Generate chart configuration from CSV or table data.

Edit Excel and CSV files in-browser with live table editing — 100% local.

Create flowcharts, sequence diagrams, class diagrams, and more using Mermaid syntax. Live preview with one-click copy and export.

Discover beautiful Google Fonts pairings for headings and body text. Preview combinations side by side with sample paragraphs.

Create custom memes with text overlays on popular images. Free online tool for making shareable content in your browser.

Generate simple logo designs from text and shapes.

Create custom icons and favicons for websites and apps. Free online icon generator with multiple sizes and formats.

Generate seamless patterns and textures for design. Free online tool to create reusable backgrounds directly in your browser.

長さ、重量、温度などの単位を変換する無料オンラインツール。

Generate EAN, UPC, CODE128, and CODE39 barcodes for products. Free online barcode generator for retail and inventory.

Generate clean short links with custom aliases, QR codes, and click tracking analytics. 100% local, no account required.

User-Agent文字列を解析してブラウザとデバイスを識別。

Check your screen resolution, viewport size, pixel ratio, and display info. Free online screen resolution checker for design testing.

Check your browser details including version, user agent, and screen size. Free online browser information tool for debugging.

Inspect file name, type, size, extension, and last modified date in your browser.

Convert bytes, KB, MB, GB, and TB with decimal and binary units.

Generate clean, SEO-friendly file names from messy names or titles.

Preview safe file-extension changes before renaming files.

Find duplicate file names from a pasted list and prepare cleanup actions.

Review archive file size, type, and extraction checklist before uploading or sharing.

Estimate target bitrate and reduction ratio for video compression.

Calculate video file size from duration, bitrate, audio bitrate, and frame rate.

Generate thumbnail text, composition, contrast, and hook ideas for videos.

Plan audio trim ranges and export notes before editing.

Estimate audio size from duration, bitrate, channels, and format.

Inspect audio file name, type, size, and browser-readable metadata.

Find free alternatives for workflow automation tools. Compare features and choose the right online integration platform.

Build n8n automation workflow templates visually. Free online tool to design integrations and automate tasks in browser.

Test and debug webhook endpoints with custom payloads. Free online webhook tester for API integration and debugging.

Build reusable workflow recipes by chaining multiple tools together. Free online workflow builder for automation.

Convert form data to PDF documents for printing and sharing. Free online form to PDF generator for business forms.

Monitor websites for content changes and get alerts. Free online website change detector for tracking updates.

Find open-source alternatives to paid software. Free online directory to discover tools that save you money in browser.

Track GitHub repository star growth over time. Free online tool to monitor project popularity in your browser.

Generate GitHub README files for your projects. Free online tool to create documentation in your browser.

Check open-source license compatibility for your project. Free online tool to avoid legal conflicts in your browser.

Generate Docker Compose configuration files. Free online tool to set up containers in your browser instantly.

Find self-hosted alternatives to cloud apps. Free online tool to discover privacy-focused software in your browser.

Find free alternatives for appointment scheduling. Compare features and pick the right online booking tool for you.

Generate Notion templates to boost productivity. Free online tool to create custom workspace layouts in your browser.

Summarize meeting notes into actionable key points. Free online tool to capture decisions and tasks in your browser.

Generate OKR goals for teams and individuals. Free online tool to set objectives and track key results in browser.

Plan and organize Kanban board workflows visually. Free online tool to map tasks and boost team productivity in browser.

Generate standard operating procedure documents. Free online tool to create process guides in your browser.

Calculate compound interest with customizable periods and rates.

Convert numbers to English amount words for checks. Free online tool for accurate financial writing in your browser.

Convert numbers to Chinese RMB amount words for invoices and contracts. Free online tool with instant, accurate results.

Split restaurant bills including tip. Calculate each person's share based on total, number of people, and tip percentage.

Compare debt avalanche vs snowball payoff strategies. See timeline, total interest, and monthly payments for each approach.

Calculate how long it will take to reach a savings goal. Input target amount, monthly savings, and interest rate.

Analyze pricing pages for optimization insights. Free online tool to improve conversion in your browser.

Create study flashcards from terms and definitions.

Write and preview LaTeX equation snippets instantly. Free online tool for math notation in your browser with live rendering.

Create custom quizzes and tests with automatic scoring. Free online tool for educators to build interactive assessments in browser.

Pomodoro-style study timer with customizable focus and break intervals. Track daily study sessions with local statistics.

Calculate weighted GPA across multiple courses. Supports 4.0, 5.0, and percentage grading scales.

Calculate overall grade based on weighted assignments, exams, and quizzes. See what score you need on remaining assessments.

Generate Sudoku puzzles with solution grids. Free online tool to create puzzles for any skill level in your browser.

Generate maze layouts with custom size options. Free online tool to create puzzles and art in your browser.

Adjustable metronome with BPM control (20-300), time signatures, accent beats, and a visual pendulum indicator. Practice with precise timing.

Calculate musical intervals between two notes. Get interval name, semitone count, and consonance level. Supports reverse calculation.

Select a root note and scale type (major, minor, pentatonic, blues, etc.) to see scale notes and piano keyboard visualization.

Playable virtual piano keyboard using mouse or keyboard keys. Supports recording short snippets and playback.

Generate chord progressions by key and style (pop, jazz, rock, classical). Play chords with audio preview and export as text.

Generate standard A4=440Hz or custom frequency pure tones. Supports sine, square, triangle, and sawtooth waveforms with volume control.

Calculate Basal Metabolic Rate (BMR) using the Mifflin-St Jeor equation based on age, gender, weight, and height.

Calculate Total Daily Energy Expenditure (TDEE) by multiplying BMR with an activity factor. Estimate daily calorie needs.

Estimate body fat percentage using the Navy method or BMI-derived formula. Input neck, waist, and hip measurements.

Calculate ideal weight range using Devine, Robinson, or Miller formulas. Based on height and gender.

Estimate due date using Naegele's rule (last menstrual period + 280 days). Also shows trimester milestones.

Predict ovulation and fertile window based on menstrual cycle length and last period date.

Generate professional contracts and agreements. Free online tool to create legal documents in your browser.

Generate Non-Disclosure Agreements for your business. Free online tool to create legal documents in your browser.

Generate formal and business letters with templates.

Generate printable receipts and invoices by filling in fields. Export as PDF or image for business records.

Create a will template by filling in personal information and asset distribution preferences.

Generate a power of attorney document specifying the agent and authorized actions.

Resize images to optimal dimensions for Instagram, Facebook, Twitter, LinkedIn, and other social platforms.

Calculate social media engagement rate using likes, comments, shares, and follower count. Compare performance metrics.

Score email subject lines based on length, keywords, emoji usage, and best practices. Improve open rates.

Generate call-to-action button copy based on product, audience, and goal. Get conversion-optimized CTA text.

Discover your MBTI personality type with this free 16-personality test. No signup required. Supports mbti, personality. 16 types support included.

Take the scientifically validated Big Five (OCEAN) personality test. Free online — measure openness, conscientiousness, extraversion, and more.

Find your Enneagram type among 9 personality types. Free online test. Free online psychology test — browser-based, no upload.

Find your zodiac sign by birth date. Learn about your star sign traits and characteristics. Free online, no upload. Astrology support included.

Check zodiac sign compatibility for love and relationships. Free compatibility checker for all 12 astrological signs. No signup required.

Get your free daily horoscope based on your zodiac sign. Updated daily. Free online psychology test — browser-based, no upload.

Translate text using multiple free engines (MyMemory, Lingva, LibreTranslate) side by side. Compare results and pick the best.

Automatically detect the language of any text. Supports 70+ languages with confidence scores. Free online, no upload. Language detect support included.

Translate text using popular free translation platforms. Switch between Google Translate, DeepL, and Bing. Supports online translate, Google Translate.

Analyze word frequency in any text. View results as a sorted table or bar chart with stop-word filtering. Free online, no upload.

Compare two texts and calculate similarity using Jaccard and Cosine algorithms. Useful for plagiarism detection. Free online, no upload.

Look up English word definitions, phonetics, examples, synonyms, and antonyms using a free dictionary API. Supports dictionary, definition.

Convert multiple images into a PowerPoint presentation. Free online presentation tool — browser-based, no upload. Supports images, to.

PPT Merger: Combine multiple PowerPoint presentations into one. Free online presentation tool — browser-based, no upload.

Create PowerPoint presentations with custom themes. Add slides via simple text input and export as PPTX. Free online, no upload.

Upload a photo and add festive holiday overlays. Create profile pictures with Christmas, New Year, Halloween and more themes.

Generate personalized holiday greetings and wishes. Choose from Christmas, New Year, Chinese New Year, Thanksgiving and more.

Design and download custom holiday greeting cards with festive themes, colors, and your own message.

Enter participant names and randomly pair gift givers. Ensures no one gets themselves. Perfect for Christmas and holiday parties.

Plan your holiday gift list with budget tracking. Add recipients, items, and costs to stay within your spending limit.

Count down the days, hours, minutes and seconds until your favorite holidays. Supports Christmas, New Year, Easter and more.

Test your microphone with real-time audio visualization and volume meter. Free online online tool — browser-based, no upload.

Test your webcam with live video preview, resolution selection, and screenshot capture. Free online online tool — browser-based, no upload.

Test your monitor for dead pixels, color accuracy, and gradient uniformity. Free online online tool — browser-based, no upload.

Test all keyboard keys with visual layout, N-key rollover detection, and latency measurement. Free online, no upload. Nkro support included.

Test your speakers with audio tones, channel isolation, and frequency sweeps. Free online online tool — browser-based, no upload.

Test your mouse buttons, scroll wheel, double-click, and tracking accuracy. Free online online tool — browser-based, no upload.

PayPalの取引手数料、純収益、実効レートを計算。無料のEC計算機 — ブラウザで完結。

Amazon FBAの手数料（販売手数料・配送費含む）を計算。無料のEC計算機 — ブラウザで完結。

eBayの落札手数料とストアレベル別の純収益を計算。無料のEC計算機 — ブラウザで完結。

Stripeの国内・国際カード決済手数料を計算。無料のEC計算機 — ブラウザで完結。

Etsyの出品料、取引手数料、決済手数料を計算。無料のEC計算機 — ブラウザで完結。

Shopifyのプラン別手数料を比較し最適なプランを見つける。無料のEC計算機 — ブラウザで完結。