# Flex Utils

> Free online web utilities. Fast, privacy-focused tools that work entirely in your browser.

Flex Utils provides free, browser-based tools for everyday digital tasks. All processing happens locally on your device - no data is uploaded to servers.

## Site Information

- URL: https://flexutils.com
- Privacy: All tools run 100% in your browser
- Cost: Free, no registration required
- Offline: Most tools work without internet after first load

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# Tools

## Calculators

### Percentage Change Calculator
**URL**: https://flexutils.com/calculators/percentage-change

Calculate percentage increase or decrease between two values.

**Features**:
- Enter old and new values
- See percentage change instantly
- Step-by-step calculation breakdown
- Works with any numbers (positive, negative, decimals)

**Use Cases**:
- Calculate price changes
- Track investment returns
- Compare sales figures
- Measure growth rates

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### Compound Interest Calculator
**URL**: https://flexutils.com/calculators/compound-interest

Calculate how your money grows over time with compound interest.

**Features**:
- Principal amount input
- Interest rate configuration
- Multiple compounding frequencies (daily, monthly, quarterly, yearly)
- Additional contribution support
- Visual chart showing growth
- Year-by-year breakdown table

**Use Cases**:
- Plan retirement savings
- Compare investment options
- Calculate loan costs
- Project savings growth

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### Home Loan EMI Calculator India
**URL**: https://flexutils.com/calculators/home-loan-india

Calculate home loan EMI with Indian currency formatting and comprehensive financial planning tools.

**Features**:
- EMI calculation with Indian currency formatting (Lakhs/Crores)
- Amortization schedule with yearly and monthly breakdown
- Prepayment analysis (reduce EMI or reduce tenure options)
- Affordability assessment based on FOIR limits (50-60%)
- Maintenance charges escalation calculator
- Scenario comparison (compare up to 3 loan scenarios)
- PDF export with charts and complete amortization schedule
- LaTeX formula display for mathematical transparency
- Interactive charts showing principal vs interest breakdown

**Default Values**:
- Principal: ₹50 Lakhs
- Interest Rate: 8.5% per annum
- Tenure: 20 years

**Input Specifications**:
- Principal Amount: ₹1 Lakh to ₹50 Crores
- Interest Rate: 1% to 20% per annum
- Tenure: 1 to 30 years
- Monthly Income: For affordability calculation
- Existing EMIs: For FOIR calculation
- Maintenance Charges: Optional escalation planning

**Use Cases**:
- Calculate monthly EMI for home loans from Indian banks (SBI, HDFC, ICICI, etc.)
- Plan prepayment strategy to save on interest
- Assess loan affordability based on income and existing obligations
- Compare different loan scenarios (tenure vs EMI trade-offs)
- Estimate total interest payable over loan tenure
- Plan for maintenance charges escalation in new apartments
- Generate detailed amortization schedule for financial planning

**Indian Market Specifics**:
- FOIR (Fixed Obligation to Income Ratio) based affordability
- Currency display in Lakhs and Crores
- Interest rates aligned with Indian banking standards
- Prepayment options as per RBI guidelines

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## Image Tools

### Image Compressor
**URL**: https://flexutils.com/image-tools/compress-image

Compress JPG, PNG, and WebP images to reduce file size.

**Features**:
- Batch processing (multiple images at once)
- Quality slider (0-100%)
- Real-time size comparison
- Download individual or all images
- No file size limits
- No uploads - processing happens in browser

**Use Cases**:
- Reduce image size for Google Photos, iCloud, Dropbox
- Optimize images for websites
- Compress photos before emailing
- Free up storage space

**Supported Formats**: JPG, JPEG, PNG, WebP

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### Image to WebP Converter
**URL**: https://flexutils.com/image-tools/image-to-webp

Convert JPG and PNG images to WebP format for smaller file sizes.

**Features**:
- Batch conversion
- Quality adjustment
- Size comparison before/after
- Download all as individual files

**Use Cases**:
- Optimize images for web
- Reduce website load times
- Save storage space
- Modern format conversion

**Input Formats**: JPG, PNG
**Output Format**: WebP

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### Image to Base64 Converter
**URL**: https://flexutils.com/image-tools/image-to-base64

Convert images to Base64 encoded strings for embedding in HTML/CSS.

**Features**:
- Instant conversion
- Copy to clipboard
- Data URI format output
- Size indicator

**Use Cases**:
- Embed images in HTML emails
- Include images in CSS
- Create self-contained HTML files
- Avoid external image requests

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### Image Color Picker
**URL**: https://flexutils.com/image-tools/image-color-picker

Extract colors from any image.

**Features**:
- Click anywhere on image to pick color
- Multiple formats: HEX, RGB, HSL, CMYK
- Copy color values to clipboard
- Zoom for precision

**Use Cases**:
- Match colors from photos
- Extract brand colors
- Design color palettes
- Web development

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### Indian Passport Photo Resizer
**URL**: https://flexutils.com/image-tools/passport-photo-india

Resize photos to Indian passport specifications.

**Features**:
- Automatic resize to 35mm × 45mm
- 200 DPI output (government requirement)
- Crop tool for positioning
- Instant preview
- Download ready-to-print photo

**Specifications**:
- Size: 35mm × 45mm (width × height)
- Resolution: 200 DPI minimum
- Output: 276 × 354 pixels

**Use Cases**:
- Indian passport applications
- Visa applications
- Government ID photos

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## Date & Time Tools

### Meeting Time Planner - World Clock & Time Zone Overlap
**URL**: https://flexutils.com/date-time/world-clock-meeting-planner

International meeting time planner with visual time zone overlap. Find business hours overlap for US-India, US-UK & global teams. Free, with calendar export.

**Features**:
- Compare up to 5 time zones
- Visual business hours overlay (green = work hours)
- Lunch hour indicators
- Meeting duration selector
- Shareable meeting links
- Auto-detects your timezone
- Calendar export support

**Why Use This Tool**:

- **International Meeting Planner**: Plan meetings across continents with visual time zone comparison. See at a glance when teams in different countries are available.
- **Business Hours Overlap Finder**: Instantly find overlapping business hours between US-India, US-UK, and other global team combinations.
- **Best Meeting Time Calculator**: Calculate the optimal meeting time that works for all participants across multiple time zones.

**Use Cases**:
- **US-India Meeting Time**: Find the best time window for US and India teams considering IST and EST/PST overlap
- **International Team Meetings**: Coordinate meetings across Europe, Asia, and Americas with visual overlap indicators
- **Remote Team Scheduling**: Plan daily standups, sprint reviews, and all-hands for distributed remote teams
- **Personal & Education**: Schedule study groups, family calls, and personal meetings across time zones

**Keywords**: meeting time planner, international meeting planner, time zone overlap, business hours overlap, us india meeting time

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## Productivity Tools

### Animated Travel Map
**URL**: https://flexutils.com/productivity/animated-travel-map

Create animated travel maps for YouTube videos, presentations, and educational content.

**Features**:
- Multi-stop sequential itinerary builder (From → Stops → To)
- City name geocoding with real-time validation
- Lat/Lng expert mode toggle per waypoint
- Auto-detect user location on page load
- Reorder waypoints with ↑↓ arrows
- 5 travel modes: Air (geodesic arc), Car, Bus, Bike (OSRM road routing), Ship (maritime lanes)
- Intelligent icon ↔ mode sync (selecting Ship icon switches to Ship mode)
- Route unavailability detection with actionable error messages
- 6 map themes: Street, Satellite, Terrain, Watercolor, Dark, Light
- Fullscreen mode with overlay playback controls
- 3-2-1 countdown before animation starts
- 60fps smooth animation via requestAnimationFrame
- Speed control (0.5x–3x), progress scrubber
- WebM video export via MediaRecorder API

**Use Cases**:
- Create travel intro animations for YouTube vlogs
- Visualize historical trade or migration routes
- Animate delivery or logistics routes for presentations
- Show multi-city tour paths in educational content

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## AI Tools

All AI tools run entirely in your browser using on-device AI. No data is sent to external servers.

### AI Idea Generator
**URL**: https://flexutils.com/ai-tools/idea-generator

Generate creative ideas using AI that runs in your browser.

**Features**:
- Multiple AI models to choose from
- Customizable prompts
- Fast generation with WebGPU acceleration
- Works offline after model downloads
- 100% private - no data leaves your device

**Use Cases**:
- Brainstorm business ideas
- Generate content topics
- Creative writing prompts
- Problem-solving suggestions

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### Voiceover Generator
**URL**: https://flexutils.com/ai-tools/voiceover-generator

Generate natural-sounding voiceovers from text.

**Features**:
- 50+ voices (male, female, various accents)
- Speed control (0.5x to 2.0x)
- Long text support
- Download as audio file
- Preview voices before generating
- Generation history

**Voice Options**:
- American English (male/female)
- British English (male/female)
- Australian English
- Indian English
- Various character voices

**Use Cases**:
- Create voiceovers for videos
- Generate audio for presentations
- Accessibility (text-to-speech)
- Content creation

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### Image Segmentation
**URL**: https://flexutils.com/ai-tools/image-segmentation

Separate objects from backgrounds in images using AI.

**Features**:
- Click to select objects
- Multiple segment selection
- Customizable mask colors
- Download segmented images
- Works with any image

**Use Cases**:
- Remove backgrounds
- Isolate objects in photos
- Create cutouts
- Photo editing

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### Image Upscaler
**URL**: https://flexutils.com/ai-tools/image-upscaler

Upscale images 2x using AI super-resolution.

**Features**:
- 2x resolution increase
- AI-powered quality enhancement
- Before/after comparison
- Download upscaled image

**Use Cases**:
- Enhance low-resolution photos
- Improve image quality
- Prepare images for printing
- Restore old photos

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### AI Document Q&A
**URL**: https://flexutils.com/ai-tools/document-qa

Ask questions about uploaded documents and get AI-generated answers grounded in the content. Complete RAG pipeline runs in your browser.

**Features**:
- Upload PDF, Markdown (.md), and TXT files
- Full RAG pipeline: extract, chunk, embed, search, rerank, generate
- Semantic embedding with nomic-embed-text-v1.5 (256 dimensions)
- Cross-encoder reranking with bge-reranker-base
- Answer generation with Qwen2.5-0.5B-Instruct (streaming)
- Citations with page numbers (PDF), heading paths (Markdown), line ranges (TXT)
- Multi-document support (up to 20 documents)
- WebGPU acceleration with WASM fallback
- Cancel/stop generation at any time
- 100% private - no data leaves your device

**Use Cases**:
- Research document analysis
- PDF question answering
- Study material comprehension
- Technical documentation lookup
- Meeting notes search
- Contract and policy review

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# Privacy & Security

## How We Protect Your Data

**No Uploads**: All tools process data directly in your browser. Your files never leave your device.

**No Tracking**: We don't track what you do with the tools or store any of your content.

**No Accounts**: Use all tools without registration or login.

**Offline Capable**: Most tools work offline after the first visit.

## Technical Details

- Processing: 100% client-side (your browser)
- Storage: Only in your browser's local storage (you control it)
- AI Models: Downloaded once, run locally
- Network: Only used to load the website and AI models

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# Frequently Asked Questions

## General

**Q: Is Flex Utils really free?**
A: Yes, all tools are completely free with no hidden costs or premium tiers.

**Q: Do I need to create an account?**
A: No, all tools work without registration.

**Q: Is my data safe?**
A: Yes, all processing happens in your browser. Your files are never uploaded to our servers.

**Q: Do the tools work offline?**
A: Most tools work offline after the first visit. AI tools require the model to be downloaded first.

## Image Tools

**Q: What image formats are supported?**
A: Most tools support JPG, PNG, and WebP. Check individual tool pages for specifics.

**Q: Is there a file size limit?**
A: No server-side limits. Large files may be slower depending on your device.

**Q: Where are my images processed?**
A: Entirely in your browser. Images never leave your device.

## AI Tools

**Q: How do the AI tools work without uploading data?**
A: AI models are downloaded to your browser and run locally using WebGPU or WebAssembly.

**Q: Why is the first use slow?**
A: AI models need to download first (one-time). After that, they're cached for faster use.

**Q: Do AI tools work offline?**
A: Yes, after the model is downloaded and cached.

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# Browser Support

## Recommended Browsers
- Google Chrome (latest)
- Microsoft Edge (latest)
- Firefox (latest)
- Safari (latest)

## AI Tools Requirements
- Modern browser with WebGPU or WebAssembly support
- Chrome/Edge recommended for best AI performance
- Minimum 4GB RAM recommended for AI tools

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# Categories

## All Categories

- **Calculators**: `/calculators` - Mathematical and financial calculators
- **Image Tools**: `/image-tools` - Image processing and conversion
- **Date & Time**: `/date-time` - Time zone and scheduling tools
- **AI Tools**: `/ai-tools` - Browser-based AI utilities
- **Productivity**: `/productivity` - Content creation and productivity tools

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# Essential Pages

## About Us
**URL**: https://flexutils.com/about

Learn about the team and mission behind Flex Utils. Covers our privacy-first philosophy, browser-based architecture, the technology powering our tools (Transformers.js, WebGPU, Next.js), and the journey from a simple image compressor to a comprehensive toolkit of 13+ free utilities across AI, image processing, calculators, and productivity.

## Contact Us
**URL**: https://flexutils.com/contact

Get in touch with the Flex Utils team via email at contact@flexutils.com or our Google Form (https://forms.gle/mB7Jnj2Qtfp2BexB6). We welcome tool support questions, feature requests, bug reports, general feedback, and partnership inquiries. We aim to respond within 48-72 hours, with bug reports and accessibility issues prioritized.

## Terms of Service
**URL**: https://flexutils.com/terms

The terms governing use of Flex Utils. Covers user agreement, acceptable use policy, client-side processing and data ownership, intellectual property rights, AI-generated content disclaimers, warranty disclaimers, limitation of liability, and third-party services. All content you process or generate using our tools belongs entirely to you.

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*Flex Utils - Free online tools that respect your privacy*

*Last updated: 2026-02-28*