# ToolsVela

> Free, fast, and secure online tools for developers, writers, and everyday productivity. All tools run entirely in your browser — your data never leaves your device. No signup required.

ToolsVela (https://www.toolsvela.com) is a privacy-first collection of browser-based utilities for working with text, JSON, images, AI prompts, documents, and more. Every tool is client-side, free, and works offline once loaded.

## Product philosophy

- **100% client-side.** Files never leave your browser. No uploads to our servers.
- **No signup.** Use any tool instantly without an account.
- **Free for everyone.** No paywalls, no quotas, no tracking of personal data.
- **Open formats.** Markdown, JSON, CSV, PDF, SVG, PNG, JPG — your files, your way.

## Core tools by category

### Text Tools
- [Online Notepad](https://www.toolsvela.com/#online-notepad): Auto-saving browser notepad with multi-tab support.
- [Word Counter](https://www.toolsvela.com/#word-counter): Live word, character, sentence, and paragraph counts.
- [Case Converter](https://www.toolsvela.com/#case-converter): Switch between UPPERCASE, lowercase, Title Case, sentence case, and more.
- [Text Compare Tool](https://www.toolsvela.com/#text-compare-tool): Side-by-side diff viewer for two text snippets.
- [Lorem Ipsum Generator](https://www.toolsvela.com/#lorem-ipsum-generator): Generate placeholder text by paragraph, sentence, or word count.

### Productivity
- [Sticky Notes](https://www.toolsvela.com/#sticky-notes-online): Colorful drag-and-drop sticky notes with auto-save.
- [Todo List](https://www.toolsvela.com/#todo-list-online): Simple, persistent task list.
- [Online Task Manager](https://www.toolsvela.com/#online-task-manager): Kanban-style board for organizing tasks across columns.
- [Online Notepad](https://www.toolsvela.com/#online-notepad): Multi-tab text editor with auto-save.

### Developer Tools
- [JSON Formatter](https://www.toolsvela.com/#json-formatter): Pretty-print, validate, and minify JSON.
- [Markdown Previewer](https://www.toolsvela.com/#markdown-previewer): Live-rendered Markdown with GitHub-flavored tables and task lists.
- [Markdown to PDF](https://www.toolsvela.com/#markdown-to-pdf): Convert Markdown to PDF with live preview, syntax highlighting, and printable output.
- [HTML/CSS/JS Compressor](https://www.toolsvela.com/#html-css-js-compressor): Minify and decompress HTML, CSS, and JavaScript.
- [Regex Tester](https://www.toolsvela.com/#regex-tester): Build and test regular expressions with real-time matching.
- [Color Contrast Checker](https://www.toolsvela.com/#color-contrast-checker): WCAG contrast ratio analysis for accessibility.
- [CSV to JSON Converter](https://www.toolsvela.com/#csv-to-json-converter): Bidirectional conversion between CSV and JSON.
- [Hash Generator](https://www.toolsvela.com/#hash-generator): MD5, SHA-1, SHA-256, SHA-512 hashing for text and files.
- [Gradient Generator](https://www.toolsvela.com/#gradient-generator): Build CSS gradients visually with presets.
- [JWT Decoder](https://www.toolsvela.com/#jwt-decoder): Inspect and verify JSON Web Tokens.

### Image Tools
- [Image Resizer](https://www.toolsvela.com/#image-resizer-online): Resize images to custom dimensions in the browser.
- [Base64 Image Converter](https://www.toolsvela.com/#base64-image-converter): Convert images to/from Base64 strings.

### Converters
- [PDF Converter](https://www.toolsvela.com/#converter): Convert text, images, or Word documents into a PDF.
- [Markdown to PDF](https://www.toolsvela.com/#markdown-to-pdf): See above (Developer Tools).
- [File Size Converter](https://www.toolsvela.com/#file-size-converter): Convert between bytes, KB, MB, GB, TB.
- [Unit Converter](https://www.toolsvela.com/#unit-converter): Convert between common units of length, weight, temperature, etc.
- [RGB to Hex Converter](https://www.toolsvela.com/#rgb-to-hex-converter) / [Hex to RGB Converter](https://www.toolsvela.com/#hex-to-rgb-converter): Color format conversion.
- [Base64 Text Encoder](https://www.toolsvela.com/#base64-text-encoder): Encode and decode text in Base64.

### Time & Date
- [Pomodoro Timer](https://www.toolsvela.com/#pomodoro-timer): Productivity timer with work/break intervals.
- [Countdown Timer](https://www.toolsvela.com/#countdown-timer): Customizable countdown to any date.
- [Age Calculator](https://www.toolsvela.com/#age-calculator): Exact age in years, months, days.
- [Time Zone Difference](https://www.toolsvela.com/#time-zone-difference): Time gap between two zones.

### Math & Health
- [Percentage Calculator](https://www.toolsvela.com/#percentage-calculator): Percent, increase/decrease, ratio calculations.
- [BMI Calculator](https://www.toolsvela.com/#bmi-calculator): Body Mass Index for health tracking.

### Utility
- [QR Code Generator](https://www.toolsvela.com/#qr-code-generator): Generate QR codes for URLs, text, and more.
- [Password Generator](https://www.toolsvela.com/#password-generator): Strong, configurable password generator.

### Business
- [Invoice Generator](https://www.toolsvela.com/#invoice-generator): Build, preview, and download branded invoices as PDF. Includes logo upload, line items, tax/discount/shipping, advance payments, balance due, and bank details. Company profile auto-saves so you don't retype your info for every invoice.

### AI Tools (2025+)
- [Tokenizer](https://www.toolsvela.com/#tokenizer): Estimate token count and cost for OpenAI, Anthropic, Google, Meta, and more. Live pricing from OpenRouter.
- [Prompt Diff Viewer](https://www.toolsvela.com/#prompt-diff-viewer): Compare two prompts with word-level diff highlighting.
- [System Prompt Builder](https://www.toolsvela.com/#system-prompt-builder): Click-to-add building blocks for LLM system prompts.
- [Temperature Visualizer](https://www.toolsvela.com/#temperature-visualizer): See how temperature affects softmax probability distributions.
- [Context Window Calculator](https://www.toolsvela.com/#context-window-calculator): Check how much context space a model has and how much you've used.
- [Words to AI Models Token Calculator](https://www.toolsvela.com/#words-token-calculator): Estimate LLM cost from word counts (input + output) across top AI models. Live pricing, no need to write the actual text first.
- [Bias Word Highlighter](https://www.toolsvela.com/#bias-word-highlighter): Flag loaded, vague, or biased words in prompts.
- [Few-Shot Formatter](https://www.toolsvela.com/#few-shot-formatter): Format example pairs as XML, JSON, Markdown, or YAML.
- [LLM Output Tester](https://www.toolsvela.com/#llm-output-tester): Test regex extraction patterns against sample LLM outputs.

## Static pages

- [Home](https://www.toolsvela.com/): Browse all tools by category.
- [Privacy Policy](https://www.toolsvela.com/#privacy): How we handle (don't handle) your data.
- [Terms of Service](https://www.toolsvela.com/#terms): Standard usage terms.

## Technical details

- **Framework**: Next.js 16.1.1 (App Router, Turbopack)
- **Hosting**: Vercel
- **Analytics**: Google Analytics 4 (anonymous, no PII)
- **Storage**: Browser localStorage and cookies only — no backend persistence
- **Auth**: None (no signup, no login)
- **API**: No public API
- **Pricing**: 100% free, no ads, no tracking beyond Google Analytics

## Optional

- [Sitemap](https://www.toolsvela.com/sitemap.xml): Full list of pages
- [robots.txt](https://www.toolsvela.com/robots.txt): Crawler directives