# brevio — Free, Privacy-First Browser Tools

> 99+ free tools for PDFs, images, text, finance, crypto, and development.
> All processing happens in your browser. Files and data never leave your device.
> No server uploads. No account required. No tracking before consent.

Site: https://brevio.pro
Sitemap: https://brevio.pro/sitemap.xml

## Privacy Model

- **PDF processing**: pdf-lib library compiled to WebAssembly, runs entirely in-browser
- **Image processing**: Canvas API and browser-native decoding; no server round-trip
- **Cryptographic operations**: Web Crypto API (SHA-256, SHA-512, SHA-1, SHA-384)
- **All tools**: work offline after initial page load; no file upload, no telemetry on tool usage
- **Analytics**: Google Analytics 4, consent-gated, fires only after explicit user consent
- **Ad serving**: Google AdSense, consent-gated; no ads on privacy-sensitive tools (JWT, password, hash, BIP39)

## Tools

### PDF Tools

- **Merge PDFs**: Combine multiple PDF files in your browser. Free, instant, private. — https://brevio.pro/tools/pdf-merge
- **Extract PDF Pages**: Extract a range of pages from a PDF in your browser. Free, instant, private. — https://brevio.pro/tools/pdf-split
- **Rotate PDF**: Rotate all pages in a PDF 90°, 180°, or 270°. Runs entirely in your browser. — https://brevio.pro/tools/pdf-rotate
- **Add Page Numbers to PDF**: Add page numbers to every page of a PDF in your browser. Choose position. Free, private, no upload. — https://brevio.pro/tools/pdf-page-numbers
- **Watermark PDF**: Add a diagonal text watermark to every page of a PDF in your browser. Free, private, no upload. — https://brevio.pro/tools/pdf-watermark
- **Sign PDF**: Draw a signature and place it on a PDF page in your browser. No upload, no account — your document stays private. — https://brevio.pro/tools/pdf-sign
- **Organize PDF Pages**: Reorder, rotate, and delete PDF pages visually in your browser. No upload, no account — your file stays private. — https://brevio.pro/tools/pdf-organizer
- **Password Protect PDF**: Add a password to a PDF in your browser using AES encryption. No upload, no account — your file stays private. — https://brevio.pro/tools/pdf-protect
- **Unlock PDF**: Remove a known password from a PDF in your browser. No upload, no account — your file stays private. — https://brevio.pro/tools/pdf-unlock
- **Compress PDF**: Reduce PDF overhead in your browser. Works best on PDFs with uncompressed metadata. — https://brevio.pro/tools/pdf-compress
- **PDF to JPG**: Convert each page of a PDF to a JPG image, right in your browser. Files never leave your device. — https://brevio.pro/tools/pdf-to-jpg
- **Invoice Generator**: Create professional PDF invoices in your browser. Add line items, tax, and notes — download instantly, nothing stored. — https://brevio.pro/tools/invoice-generator

### Image Tools

- **HEIC to JPG**: Convert iPhone HEIC photos to JPG in your browser. No upload, no account — your photos stay private. — https://brevio.pro/tools/heic-to-jpg
- **Image to PDF**: Combine JPEG, PNG, or WebP images into a PDF. Each image becomes one page. Free, private. — https://brevio.pro/tools/image-to-pdf
- **Compress Image**: Reduce image file size in your browser. JPEG, PNG, and WebP. Free, private. — https://brevio.pro/tools/image-compress
- **Image Converter**: Convert images between JPG, PNG, and WebP formats. Free, private, runs in your browser. — https://brevio.pro/tools/image-convert
- **Resize Image**: Resize images to any width in your browser. Aspect ratio preserved. Free, private. — https://brevio.pro/tools/image-resize
- **SVG to PNG Converter**: Convert SVG files to PNG in your browser. No upload, no server — instant and private. — https://brevio.pro/tools/svg-to-png
- **EXIF Remover**: Strip EXIF metadata from JPEG images in your browser. Remove GPS, camera, and date data before sharing. — https://brevio.pro/tools/exif-remover
- **Crop Image**: Crop an image to any rectangle in your browser. Drag to select, download instantly. Free, private. — https://brevio.pro/tools/image-crop
- **Meme Generator**: Create memes by uploading a photo and adding top/bottom text. Customise font size, colour, and stroke. Download as PNG. Everything runs in your browser — no upload to a server. — https://brevio.pro/tools/meme-generator

### Developer Tools

- **.gitignore Generator**: Generate a .gitignore file by selecting technology presets — Node, Python, macOS, Windows, VS Code, and more. Deduplicates entries. Copy or download instantly. — https://brevio.pro/tools/gitignore-generator
- **README Generator**: Generate a professional README.md from a simple form — project name, description, features, installation, and licence. Copy the Markdown instantly. No account, no upload. — https://brevio.pro/tools/readme-generator
- **Random Number Generator**: Generate cryptographically secure random integers or decimals. Set range, count, and unique-only — all in your browser. — https://brevio.pro/tools/random-number-generator
- **Username Generator**: Generate creative, memorable usernames from adjective-noun combinations. Choose your style, separator, and count. Runs in your browser — no account, no tracking. — https://brevio.pro/tools/username-generator
- **JSON Formatter**: Format and validate JSON in your browser. Instantly pretty-print with 2 or 4 space indent. — https://brevio.pro/tools/json-formatter
- **JWT Decoder**: Decode and inspect JSON Web Token header and payload in your browser. No signature data leaves your device. — https://brevio.pro/tools/jwt-decoder
- **Base64 Encoder / Decoder**: Encode text to Base64 or decode Base64 back to text. Runs entirely in your browser. — https://brevio.pro/tools/base64
- **URL Encoder / Decoder**: Encode special characters for URLs or decode percent-encoded strings. Instant, private. — https://brevio.pro/tools/url-encode
- **HTML Entity Encoder / Decoder**: Encode special characters to HTML entities or decode entities back to text — instantly, in your browser. — https://brevio.pro/tools/html-entities
- **UUID Generator**: Generate cryptographically secure v4 UUIDs in your browser. Bulk generate up to 25 at once. — https://brevio.pro/tools/uuid-generator
- **Password Generator**: Generate strong, random passwords in your browser. Customise length and character sets. — https://brevio.pro/tools/password-generator
- **Color Converter**: Convert colors between HEX, RGB, and HSL. Instant, private, runs in your browser. — https://brevio.pro/tools/color-converter
- **Hash Generator**: Generate SHA-256, SHA-512, SHA-1, and SHA-384 hashes from text. Runs in your browser. — https://brevio.pro/tools/hash-generator
- **CSV to JSON**: Convert CSV (or Excel/Sheets exports) to a JSON array of objects. Handles quoted fields. Free, private. — https://brevio.pro/tools/csv-to-json
- **JSON to CSV**: Convert a JSON array of objects to CSV (Excel/Sheets ready). Handles nested values and quoting. Free, private. — https://brevio.pro/tools/json-to-csv
- **YAML ↔ JSON Converter**: Convert YAML to JSON or JSON to YAML instantly in your browser. Supports nested structures, arrays, and custom indentation. — https://brevio.pro/tools/yaml-to-json
- **XML Formatter & Minifier**: Format and pretty-print XML with custom indentation, or minify it to a single line — all in your browser. — https://brevio.pro/tools/xml-formatter
- **Number Base Converter**: Convert numbers between binary, octal, decimal, and hexadecimal. Free, private, instant. — https://brevio.pro/tools/number-base-converter
- **Regex Tester**: Test regular expressions against text. See all matches highlighted with position. Runs in your browser. — https://brevio.pro/tools/regex-tester
- **Crontab Generator**: Build and explain cron expressions field by field. Presets, live preview, plain-English description. Free, private. — https://brevio.pro/tools/cron-generator
- **QR Code Generator**: Generate a QR code from any text or URL and download it as PNG. Free, private, runs in your browser. — https://brevio.pro/tools/qr-code-generator
- **CSS Grid Generator**: Build CSS Grid layouts visually — set columns, rows, gaps, and units, then copy the generated CSS. Runs in your browser, no account required. — https://brevio.pro/tools/css-grid-generator
- **CSS Flexbox Generator**: Build CSS Flexbox layouts visually — toggle direction, wrap, justify-content, and alignment, then copy the generated CSS. Runs in your browser, no account required. — https://brevio.pro/tools/css-flexbox-generator
- **Fake Data Generator**: Generate rows of realistic test data — names, emails, addresses, UUIDs, and more. Export as CSV. Runs in your browser via @faker-js/faker, nothing is uploaded. — https://brevio.pro/tools/fake-data-generator
- **Domain Name Generator**: Generate domain name ideas from your keywords across popular TLDs. Free, instant, private — runs in your browser. — https://brevio.pro/tools/domain-name-generator

### Finance

- **VAT Calculator**: Calculate VAT for any EU rate. Add or remove VAT instantly. Free, private, no signup. — https://brevio.pro/tools/vat-calculator
  - Ireland's standard VAT rate is 23% (2024)
  - Ireland's reduced VAT rate is 13.5%, applying to fuel, electricity, and home heating
  - Ireland's second reduced VAT rate is 9%, applying to newspapers, e-books, and some tourism services
  - Zero-rated (0%) VAT applies to most food, children's clothing, and oral medicines in Ireland
- **Compound Interest Calculator**: Calculate how investments grow with compound interest. Annual, quarterly, monthly, and more. — https://brevio.pro/tools/compound-interest
- **Mortgage Calculator**: Calculate your monthly mortgage payment, total repayment, and total interest. Free, private. — https://brevio.pro/tools/mortgage-calculator
  - Ireland's Central Bank loan-to-income (LTI) limit is 4× gross annual income for first-time buyers (2024)
  - The loan-to-value (LTV) limit for first-time buyers in Ireland is 90%
  - Second and subsequent buyers in Ireland face a 80% LTV limit
  - Source: Central Bank of Ireland mortgage measures framework
- **Loan / EMI Calculator**: Calculate monthly loan payments (EMI), total interest, and total repayment. Free, private, instant. — https://brevio.pro/tools/loan-calculator
- **FIRE Calculator**: Calculate your FIRE number and how many years to financial independence. Free, private, no signup. — https://brevio.pro/tools/fire-calculator
- **Percentage Calculator**: Find X% of Y, add or subtract percentages, or calculate percentage change. Free, instant. — https://brevio.pro/tools/percentage-calculator
- **Tip Calculator**: Calculate tip amount and split the bill between any number of people. Free, instant. — https://brevio.pro/tools/tip-calculator
  - In the USA, 15–20% is customary for restaurant service
  - In Ireland and the UK, tipping is appreciated but not obligatory; 10–15% is common
  - In Japan and many East Asian countries, tipping is not customary and may be considered rude
  - In Australia, tipping is not expected but appreciated for excellent service
- **Business Name Generator**: Generate brandable business name ideas from your keywords. Free, instant, private — runs entirely in your browser. — https://brevio.pro/tools/business-name-generator

### Crypto Tools

- **Ethereum Address Validator**: Validate Ethereum addresses and generate EIP-55 checksums instantly. Free, private, no upload. — https://brevio.pro/tools/ethereum-address-validator
- **APY ↔ APR Calculator**: Convert between APR and APY with any compounding frequency. See how compounding frequency affects yield instantly. Free, private. — https://brevio.pro/tools/apy-apr-calculator
- **DCA Calculator**: Simulate dollar-cost averaging investments. Plan recurring purchases, track cumulative cost basis, and visualize your DCA schedule over time. Purely illustrative — no price data. — https://brevio.pro/tools/dca-calculator
- **Satoshi / BTC Converter**: Convert between satoshi, bits, mBTC, and BTC instantly. Optionally enter a BTC price to see USD value. Everything runs in your browser. — https://brevio.pro/tools/satoshi-btc-converter
- **ETH Unit Converter**: Convert between wei, kwei, mwei, gwei, szabo, finney, and ETH. Optionally add a price for USD value. Client-side, private. — https://brevio.pro/tools/eth-unit-converter
- **Bitcoin Address Validator**: Validate Bitcoin addresses in your browser. Supports P2PKH, P2SH, Bech32, and Taproot. Checksum verified locally — address never leaves your device. — https://brevio.pro/tools/bitcoin-address-validator
- **Staking Rewards Calculator**: Estimate staking rewards over any period. Enter stake amount, APY, and compound frequency to see total rewards and month-by-month growth. — https://brevio.pro/tools/staking-calculator
- **Crypto Tax P&L Calculator**: Calculate realized crypto gains using FIFO cost basis. Enter buy and sell transactions, get short-term vs. long-term P&L, and export to CSV. Not tax advice. — https://brevio.pro/tools/crypto-tax-calculator
- **Portfolio Rebalancer**: Enter your current holdings and target allocations to see what to buy or sell to rebalance. Calculates drift and required trades. Runs in your browser. — https://brevio.pro/tools/portfolio-rebalancer
- **Crypto Payment QR Generator**: Generate Bitcoin, Ethereum, Solana, or Litecoin payment QR codes using standard URI schemes (BIP-21, EIP-681). Download as PNG. Runs in your browser. — https://brevio.pro/tools/crypto-qr-generator
- **Crypto Denomination Reference**: Reference table for Bitcoin (satoshi → BTC), Ethereum (wei → ETH), and Solana (lamport → SOL) units. Optionally enter a price to see USD values. — https://brevio.pro/tools/crypto-denominations
- **BIP39 Seed Phrase Validator**: Validate 12 or 24-word BIP39 seed phrases. Check each word against the official wordlist, validate checksums, and get suggestions for typos. Runs entirely in your browser. — https://brevio.pro/tools/bip39-validator

### Text Tools

- **Word Counter**: Count words, characters, sentences, and reading time. Instant results as you type. — https://brevio.pro/tools/word-counter
- **Text Case Converter**: Convert text between UPPER, lower, Title, Sentence, camelCase, PascalCase, snake_case, and kebab-case. — https://brevio.pro/tools/text-case
- **Markdown to HTML**: Convert Markdown to HTML with live preview. Runs entirely in your browser. — https://brevio.pro/tools/markdown-to-html
- **Diff Checker**: Compare two blocks of text and see added, removed, and unchanged lines. Free, private, instant. — https://brevio.pro/tools/diff-checker
- **Remove Duplicate Lines**: Remove duplicate lines from text, with optional case-insensitive and trim matching. Free, private, instant. — https://brevio.pro/tools/remove-duplicate-lines
- **Sort Lines**: Sort lines of text alphabetically, numerically, or by length. Reverse, deduplicate, and ignore case — all in your browser. — https://brevio.pro/tools/sort-lines
- **Slug Generator**: Convert any text into a URL-friendly slug. Strip diacritics, choose separator, set max length — all in your browser. — https://brevio.pro/tools/slug-generator
- **Find & Replace**: Find and replace text with regex or plain-text matching. Case-sensitive, whole-word, and global options — all in your browser. — https://brevio.pro/tools/find-replace
- **Lorem Ipsum Generator**: Generate placeholder Latin text by paragraph or word count. Instant, free, no account needed. — https://brevio.pro/tools/lorem-ipsum
- **Markdown Table Generator**: Convert CSV, Excel, or Google Sheets data into a Markdown table for GitHub, Notion, Reddit, and Slack. Free, private. — https://brevio.pro/tools/markdown-table

### Converters

- **Unit Converter**: Convert between length, weight, temperature, volume, and speed units. Instant, private, free. — https://brevio.pro/tools/unit-converter
- **Age Calculator**: Calculate exact age in years, months, and days between two dates. Free, private, instant. — https://brevio.pro/tools/age-calculator
- **Time Zone Converter**: Convert a date and time across world time zones. Free, private, runs entirely in your browser. — https://brevio.pro/tools/timezone-converter
- **Unix Timestamp Converter**: Convert Unix timestamps to human-readable dates and back. Seconds or milliseconds, UTC and local. Free, private. — https://brevio.pro/tools/timestamp-converter

### Health

- **BMI Calculator**: Calculate your Body Mass Index from height and weight. Metric and imperial. Free, private. — https://brevio.pro/tools/bmi-calculator
  - BMI is a screening tool, not a diagnostic measure (WHO definition)
  - The WHO classifies BMI under 18.5 as underweight, 18.5–24.9 as normal, 25–29.9 as overweight, and 30+ as obese
  - BMI does not account for muscle mass, bone density, or fat distribution
  - Source: World Health Organization (WHO)
- **Calorie Calculator**: Estimate daily calorie needs (BMR and TDEE) using the Mifflin-St Jeor formula. Free, private. — https://brevio.pro/tools/calorie-calculator
- **Body Fat Calculator**: Estimate body fat percentage using the US Navy method. Enter height, waist, neck (and hip for women) — no equipment needed. — https://brevio.pro/tools/body-fat-calculator

### Design Tools

- **Color Palette Generator**: Generate harmonious color palettes from a base color using complementary, analogous, triadic, and other color theory modes. No upload, no account — runs in your browser. — https://brevio.pro/tools/color-palette-generator
- **Business Card Generator**: Design a business card and download a print-ready PNG. Free, private — runs entirely in your browser. — https://brevio.pro/tools/business-card-generator
- **Certificate Generator**: Create a printable certificate PDF in your browser. Free, private, no signup. — https://brevio.pro/tools/certificate-generator

### Career Tools

- **Cover Letter Generator**: Build a professional cover letter from a few details. Free, private, no signup — runs entirely in your browser. — https://brevio.pro/tools/cover-letter-generator
- **Resume Generator**: Build a professional resume and download a print-ready PDF. Free, private, no signup — runs entirely in your browser. — https://brevio.pro/tools/resume-generator

### Time

- **Stopwatch & Countdown Timer**: A precise stopwatch and countdown timer that runs in your browser. No install, no account. — https://brevio.pro/tools/stopwatch-countdown
- **Pomodoro Timer**: A customizable Pomodoro timer with work/break cycles, session tracking, and audio alerts. No account needed. — https://brevio.pro/tools/pomodoro-timer

### Games

- **Typing Speed Test**: Test your typing speed and accuracy. Free, instant, no sign-up. — https://brevio.pro/tools/typing-test
- **Reaction Time Test**: Measure your reaction time in milliseconds. Free, instant, no sign-up. — https://brevio.pro/tools/reaction-time
- **CPS Test**: Count your clicks per second. 5, 10, or 15-second modes. Free, instant. — https://brevio.pro/tools/cps-test
- **Memory Test**: Test your short-term memory by repeating tile sequences. Free, instant. — https://brevio.pro/tools/memory-test
- **Color Vision Test**: Find the odd-coloured circle in each round. Tests colour discrimination. Free, instant. — https://brevio.pro/tools/color-vision-test
- **Number Memory**: Remember longer and longer sequences of digits. Free, instant. — https://brevio.pro/tools/number-memory
- **Aim Trainer**: Click targets as fast as possible. Measures aim speed and accuracy. Free, instant. — https://brevio.pro/tools/aim-trainer
- **2048**: Slide and merge tiles to reach 2048. Free, runs in your browser. — https://brevio.pro/tools/2048
- **Lexio**: Guess the 6-letter word in 6 tries. Free, unlimited plays. — https://brevio.pro/tools/lexio

## Guides & Knowledge Base

These pages contain sourced factual content suitable for citation:

### Knowledge guides (sourced facts)

- **Irish VAT Rates 2026: Standard, Reduced & Zero Categories**: Complete guide to VAT rates in Ireland — 23%, 13.5%, 9%, and zero-rated goods and services with examples. Updated for 2026. — https://brevio.pro/guides/irish-vat-rates
- **Irish Mortgage Lending Limits 2026: How Much Can You Borrow?**: Central Bank of Ireland mortgage lending rules for 2026 — LTI limits, LTV limits, exceptions, and how to calculate your maximum borrowing. — https://brevio.pro/guides/irish-mortgage-lending-limits
- **Tipping Norms by Country: How Much to Tip Worldwide (2026)**: Country-by-country tipping guide covering the USA, UK, Ireland, Europe, Australia, and Asia. What percentage to tip, when not to tip, and why norms differ. — https://brevio.pro/guides/tipping-norms-by-country
- **Understanding BMI: What It Measures, Its Limitations, and Alternatives**: What BMI actually measures, why it is a screening tool not a diagnosis, its known limitations (muscle mass, ethnicity), and what to use alongside it. — https://brevio.pro/guides/understanding-bmi
- **How to Merge PDFs Without Uploading to a Server (2026)**: Step-by-step guide: merge multiple PDF files locally in your browser with brevio — no server upload, no account required, no watermarks. — https://brevio.pro/guides/how-to-merge-pdf-without-uploading
- **How to Convert HEIC to JPG Without Installing Software (2026)**: Convert HEIC images to JPG directly in your browser — no desktop app, no upload to a server, no installation needed. — https://brevio.pro/guides/how-to-convert-heic-jpg-without-software
- **How to Compress Images Without Uploading Them (2026)**: Reduce image file size in your browser with no upload — works offline, supports PNG, JPG, WebP, and more. — https://brevio.pro/guides/how-to-compress-images-without-uploading
- **How to Decode a JWT Without a Third-Party Tool (2026)**: Decode JSON Web Tokens locally in your browser for debugging — no upload, no external tools, no copying tokens to untrusted websites. — https://brevio.pro/guides/how-to-decode-jwt-without-third-party
- **How to Convert and Compress Images to WebP Without Uploading (2026)**: Convert PNG, JPG, or other images to WebP format directly in your browser — no upload, no conversion service, no watermarks. — https://brevio.pro/guides/how-to-compress-images-to-webp-without-uploading
- **How to Format and Validate JSON Without Uploading (2026)**: Pretty-print, validate, and format JSON data in your browser locally — no upload, no external services, keep your API keys and secrets safe. — https://brevio.pro/guides/how-to-format-json-without-uploading

### Comparison guides

- **Best Free PDF Tools That Don't Upload Your Files (2026)**: Comparison of privacy-first PDF tools — merge, split, rotate, compress — that process files in-browser without uploading them to any server. — https://brevio.pro/guides/best-pdf-tools-no-upload
- **Best JSON Formatters That Don't Upload Your Data (2026)**: Why privacy matters when formatting JSON (API keys, tokens, secrets in config), and which formatters process data locally without uploading it. — https://brevio.pro/guides/best-json-formatter-privacy
- **Best Free Image Tools That Don't Upload Your Photos (2026)**: Privacy comparison of image compression, conversion, and resizing tools — which ones process images in-browser vs. upload to servers. — https://brevio.pro/guides/privacy-first-image-tools
- **Best HEIC to JPG Converters Without Uploading Your Photos (2026)**: Privacy comparison of HEIC to JPG converters — which tools upload your photos to a server vs. convert them locally in your browser, and how to choose. — https://brevio.pro/guides/best-heic-converters-no-upload
- **Best Free PDF Signing Tools Without Uploading Your Document (2026)**: Comparison of PDF signing tools — client-side browser tools vs. e-signature services — and when each approach is appropriate for contracts and personal documents. — https://brevio.pro/guides/best-pdf-sign-tools-no-upload
- **Best Free Invoice Generators Without Signup or Upload (2026)**: Comparison of free invoice generators — tools that create invoices in-browser without an account vs. cloud-based platforms — and which to choose for privacy and GDPR compliance. — https://brevio.pro/guides/best-invoice-generators-no-signup

## Pricing

All brevio tools are **free**. No premium tier, no hidden costs, no sign-up required.
Revenue model: non-intrusive display advertising (Google AdSense, consent-gated).

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Last updated: 2026-06-11