# SolveBar

> SolveBar is a free online toolbox for developers and crypto users. It offers 85+ browser-based tools across categories including developer utilities, blockchain/crypto tools, finance calculators, productivity apps, PDF tools, and image editors. No account required, no data sent to servers — everything runs locally in the browser.

## Home
- [SolveBar Home](https://solvebar.com/): Full directory of all 85+ free tools.

## General Tools
- [Unit Converter](https://solvebar.com/tools/unit-converter): Convert length, weight, temperature, area, volume and more.
- [Percentage Calculator](https://solvebar.com/tools/percentage-calculator): Calculate percentages, increases, decreases and ratios.
- [Word & Character Counter](https://solvebar.com/tools/word-counter): Count words, characters, sentences and reading time.
- [Password Generator](https://solvebar.com/tools/password-generator): Generate strong, secure random passwords instantly.
- [BMI Calculator](https://solvebar.com/tools/bmi-calculator): Calculate Body Mass Index and healthy weight range.
- [Currency Converter](https://solvebar.com/tools/currency-converter): Live exchange rates for 150+ currencies.
- [QR Code Generator](https://solvebar.com/tools/qr-code-generator): Generate and scan QR codes for URLs, text, WiFi and more.
- [Scientific Calculator](https://solvebar.com/tools/scientific-calculator): Full scientific calculator with formula history.
- [Color Palette Generator](https://solvebar.com/tools/color-palette): Generate harmonious palettes and convert color formats.
- [Chart Builder](https://solvebar.com/tools/chart-builder): Build bar, line, pie and scatter charts from CSV data.
- [Resume / CV Builder](https://solvebar.com/tools/resume-builder): Build a professional resume and export as PDF, free.
- [Typing Speed Test](https://solvebar.com/tools/typing-speed-test): Test typing speed in WPM with accuracy tracking.
- [Barcode Generator](https://solvebar.com/tools/barcode-generator): Generate barcodes in CODE128, EAN-13, QR and more.
- [Certificate Generator](https://solvebar.com/tools/certificate-generator): Design and generate printable certificates as PDF.

## Developer Tools
- [JSON Formatter & Validator](https://solvebar.com/tools/json-formatter): Format and validate JSON securely offline in your browser.
- [Base64 Encoder / Decoder](https://solvebar.com/tools/base64-encoder): Encode and decode Base64 strings instantly.
- [Hash Generator](https://solvebar.com/tools/hash-generator): Generate MD5, SHA-1, SHA-256 and SHA-512 hashes.
- [Unix Timestamp Converter](https://solvebar.com/tools/unix-timestamp-converter): Convert Unix timestamps to human-readable dates.
- [Code Diff Checker](https://solvebar.com/tools/diff-checker): Compare two blocks of text or code and highlight differences.
- [Regex Tester](https://solvebar.com/tools/regex-tester): Test regular expressions with live match highlighting.
- [JWT Decoder](https://solvebar.com/tools/jwt-decoder): Decode and inspect JWT tokens — header, payload and expiry.
- [Cron Expression Generator](https://solvebar.com/tools/cron-generator): Build cron expressions visually and see them in plain English.
- [Mock Data Generator](https://solvebar.com/tools/fake-data-generator): Generate fake users, IPs, UUIDs, credit cards, and custom JSON.
- [SQL Formatter](https://solvebar.com/tools/sql-formatter): Format and beautify SQL queries with dialect support.
- [CSV ↔ JSON Converter](https://solvebar.com/tools/csv-json-converter): Convert CSV to JSON and JSON to CSV with live preview.
- [XML / HTML Formatter](https://solvebar.com/tools/xml-formatter): Format, validate and minify XML and HTML.
- [Code Snippet Manager](https://solvebar.com/tools/code-snippet-manager): Save, organize and search code snippets with syntax highlighting.
- [Markdown Editor](https://solvebar.com/tools/markdown-editor): Full markdown editor with live preview and document library.
- [Favicon Generator](https://solvebar.com/tools/favicon-generator): Generate favicon.ico and PNG icons in all sizes from any image.

## Blockchain & Crypto Tools
- [ETH Gas Tracker](https://solvebar.com/tools/eth-gas-tracker): Live Ethereum gas prices — slow, standard and fast.
- [Crypto P&L Calculator](https://solvebar.com/tools/crypto-pnl-calculator): Calculate crypto profit and loss from any trade.
- [Wei / Gwei / ETH Converter](https://solvebar.com/tools/eth-unit-converter): Convert between Wei, Gwei and ETH instantly.
- [ABI Decoder / Encoder](https://solvebar.com/tools/abi-decoder): Decode and encode Ethereum ABI data for smart contracts.
- [Wallet Age Checker](https://solvebar.com/tools/wallet-age-checker): Check how old any Ethereum wallet address is.
- [Crypto Tax Calculator](https://solvebar.com/tools/crypto-tax-calculator): Estimate capital gains tax on crypto trades, no sign-up.
- [Crypto Portfolio Tracker](https://solvebar.com/tools/crypto-portfolio): Track crypto holdings with live prices and P&L.
- [Crypto Watchlist](https://solvebar.com/tools/crypto-watchlist): Watch live crypto prices with custom target alerts.
- [DCA Calculator](https://solvebar.com/tools/dca-calculator): Calculate returns from dollar cost averaging into any crypto.
- [Crypto Fear & Greed Index](https://solvebar.com/tools/fear-greed-index): Live crypto market sentiment indicator.
- [Crypto Staking Calculator](https://solvebar.com/tools/crypto-staking-calculator): Calculate staking rewards and APY returns.
- [Liquidation Price Calculator](https://solvebar.com/tools/liquidation-calculator): Calculate liquidation price for leveraged crypto positions.
- [Smart Contract Reader](https://solvebar.com/tools/contract-reader): Interact with any smart contract using its ABI.
- [Solana Transaction Decoder](https://solvebar.com/tools/solana-tx-decoder): Decode any Solana transaction into human-readable instructions.
- [Multi-Wallet Balance Checker](https://solvebar.com/tools/multi-wallet-checker): Check token balances across multiple wallets.
- [BIP39 Mnemonic Generator](https://solvebar.com/tools/bip39-generator): Generate and validate BIP39 mnemonic seed phrases offline.

## Finance Tools
- [GST / VAT Calculator](https://solvebar.com/tools/gst-calculator): Add or remove GST and VAT from any amount.
- [ROI Calculator](https://solvebar.com/tools/roi-calculator): Calculate return on investment for any investment.
- [Inflation Calculator](https://solvebar.com/tools/inflation-calculator): See how inflation erodes purchasing power over time.
- [Loan / EMI Calculator](https://solvebar.com/tools/loan-calculator): Calculate monthly EMI, total interest and repayment schedule.
- [Budget Tracker](https://solvebar.com/tools/budget-tracker): Track income and expenses by category with monthly overview.
- [Net Worth Tracker](https://solvebar.com/tools/net-worth-tracker): Track assets and liabilities to calculate net worth.
- [Compound Interest Calculator](https://solvebar.com/tools/compound-interest): See how investments grow over time with compound interest.
- [Mortgage Calculator](https://solvebar.com/tools/mortgage-calculator): Calculate mortgage payments with amortization chart.
- [Invoice Generator](https://solvebar.com/tools/invoice-generator): Create professional invoices and download as PDF.
- [Receipt Generator](https://solvebar.com/tools/receipt-generator): Generate professional receipts and download as PDF.

## Productivity Tools
- [Pomodoro Timer](https://solvebar.com/tools/pomodoro-timer): Focus timer with 25/5 sessions, streaks and daily history.
- [Todo List](https://solvebar.com/tools/todo-list): Clean todo list with priorities, due dates and local storage.
- [Quick Notes](https://solvebar.com/tools/quick-notes): Instant notes with multiple tabs, auto-save and markdown support.
- [Habit Tracker](https://solvebar.com/tools/habit-tracker): Track daily habits with streaks, heatmap and completion history.
- [Kanban Board](https://solvebar.com/tools/kanban-board): Drag-and-drop Kanban board saved in your browser.
- [Flashcard Study Tool](https://solvebar.com/tools/flashcard-tool): Create flashcard decks with spaced repetition and progress tracking.

## PDF Tools
- [PDF to Images](https://solvebar.com/tools/pdf-to-images): Convert PDF pages to PNG or JPG images.
- [PDF Merger](https://solvebar.com/tools/pdf-merger): Combine multiple PDF files into one.
- [PDF Splitter](https://solvebar.com/tools/pdf-splitter): Split a PDF into individual pages or page ranges.
- [PDF Compressor](https://solvebar.com/tools/pdf-compressor): Reduce PDF file size without losing quality.
- [PDF to Text Extractor](https://solvebar.com/tools/pdf-to-text): Extract all text content from any PDF.
- [PDF Page Rotator](https://solvebar.com/tools/pdf-rotator): Rotate PDF pages 90, 180 or 270 degrees.
- [PDF Watermark](https://solvebar.com/tools/pdf-watermark): Add text or image watermarks to PDF pages.
- [PDF Metadata Editor](https://solvebar.com/tools/pdf-metadata): View and edit PDF metadata.
- [PDF Page Reorder](https://solvebar.com/tools/pdf-page-reorder): Drag and drop to reorder pages in a PDF.
- [PDF Form Filler](https://solvebar.com/tools/pdf-form-filler): Fill in PDF form fields and download the completed form.
- [PDF Canvas Builder](https://solvebar.com/tools/pdf-builder): Build PDFs from scratch with a drag-and-drop canvas.
- [Markdown to PDF](https://solvebar.com/tools/markdown-to-pdf): Convert Markdown text to a styled PDF document.
- [HTML to PDF](https://solvebar.com/tools/html-to-pdf): Convert any HTML page or snippet to a PDF document.

## Image Tools
- [Image Compressor](https://solvebar.com/tools/image-compressor): Compress images to reduce file size without losing quality.
- [Image Resizer](https://solvebar.com/tools/image-resizer): Resize images to exact dimensions or by percentage.
- [Image Cropper](https://solvebar.com/tools/image-cropper): Crop images with freeform or fixed aspect ratio selection.
- [Image Format Converter](https://solvebar.com/tools/image-converter): Convert images between JPG, PNG, WebP and GIF.
- [Image to Base64](https://solvebar.com/tools/image-to-base64): Convert images to Base64 strings for use in HTML and CSS.
- [EXIF Metadata Viewer](https://solvebar.com/tools/exif-viewer): View hidden metadata inside photos — camera, GPS, settings.
- [Color Picker from Image](https://solvebar.com/tools/color-picker-image): Pick any color from an uploaded image and get HEX, RGB, HSL.
- [Image Filters & Effects](https://solvebar.com/tools/image-filters): Apply filters — brightness, contrast, blur, grayscale and more.
- [Image Watermark](https://solvebar.com/tools/image-watermark): Add text or image watermarks to your photos.
- [SVG to PNG Converter](https://solvebar.com/tools/svg-to-png): Convert SVG files to PNG at any resolution.
- [Image Diff Checker](https://solvebar.com/tools/image-diff): Compare two images and highlight pixel differences.

## Blog
- [Blog Home](https://solvebar.com/blog): Articles on developer privacy, security and browser-based tools.
- [7 Hidden Dangers of Cloud Converters](https://solvebar.com/blog/7-hidden-dangers-of-cloud-file-converters-2026): Why uploading files to cloud converters is risky.
- [Why Browser-Based Tools are the Future](https://solvebar.com/blog/why-browser-based-tools-are-the-future-of-privacy-2026): Privacy case for local, browser-based developer tools.
- [How to Add Watermarks Without Uploading](https://solvebar.com/blog/how-to-protect-images-watermark-without-uploading): Protect images locally without sending data to servers.

## Legal & Info
- [About](https://solvebar.com/about/): About SolveBar and its mission.
- [Privacy Policy](https://solvebar.com/privacy): How SolveBar handles user data (spoiler: it doesn't collect any).
- [Terms of Service](https://solvebar.com/terms): Terms of use.
- [Sitemap](https://solvebar.com/sitemap.xml): Full XML sitemap.

## Optional: Pages to skip
- [Disclaimer](https://solvebar.com/disclaimer): Legal disclaimer page.
- [DMCA](https://solvebar.com/dmca): DMCA policy page.