# Gera Tools

> Fast, private browser tools. Your files never leave your device.

Privacy-first browser utilities (1946+ tools). Every tool runs
100% client-side in the user's browser — files and data never leave the
device, there is no server-side processing, no upload, no account, and no
tracking of tool content. Free to use, supported by unobtrusive ads.

This is a curated index. For the full per-tool listing with descriptions,
see [https://geratools.com/llms-full.txt](https://geratools.com/llms-full.txt). A machine-readable
index of every tool is at [https://geratools.com/search.json](https://geratools.com/search.json).

## Browse by category
- [Calculators & Converters](https://geratools.com/category/calculator) — 721 tools
- [Developer Tools](https://geratools.com/category/developer) — 582 tools
- [Text & Writing Tools](https://geratools.com/category/text) — 272 tools
- [Image & PDF Tools](https://geratools.com/category/image) — 65 tools
- [Everyday & Quick-Help Apps](https://geratools.com/category/quick-help) — 55 tools
- [AI Tools](https://geratools.com/category/ai) — 200 tools
- [Learn AI](https://geratools.com/category/ai-learning) — 2 tools
- [Validators & Checkers](https://geratools.com/category/validators) — 10 tools
- [Tax & Payroll](https://geratools.com/category/tax) — 39 tools

## Calculators & Converters (721 tools)
> Free online calculators and unit converters for finance, health, math, science, home improvement and everyday questions. Every calculator runs entirely in your browser — instant results, no signup, nothing sent to a server.
Index: https://geratools.com/category/calculator

Sub-categories:
- Business & Marketing (22)
- Tax & Wages (10)
- Medical & Clinical (17)
- Health & Fitness (33)
- Chemistry (17)
- Physics (11)
- Electronics (18)
- Automotive (21)
- Music & Audio (31)
- Gaming (30)
- School & Study (11)
- Crypto & DeFi (10)
- Compliance & Policy (2)
- City Costs & Commuting (4)
- Social Media & Creator (1)
- Astronomy (13)
- Geography & GPS (12)
- Statistics & Probability (9)
- Geometry (12)
- Math & Algebra (34)
- Food, Cooking & Brewing (11)
- Farming & Garden (19)
- Home & DIY (46)
- Finance & Money (37)
- Conversions & Units (70)
- Date & Time (14)
- Photo & Video (19)
- Sports & Recreation (25)
- Clinical Scores & Lab (21)
- Machining & Manufacturing (17)
- Electrical & NEC (15)
- Shipping, Freight & Trade (15)
- Sustainability & ESG (14)
- Legal & Regulatory (11)
- Exams & Admissions (7)
- More Calculators (62)

Popular tools:
- [VAT & Sales Tax Calculator](https://geratools.com/vat-calculator)
- [Compound Interest & Savings Calculator](https://geratools.com/compound-interest-calculator)
- [Free Invoice Generator](https://geratools.com/invoice-generator)
- [Loan & Personal Credit Calculator](https://geratools.com/loan-calculator)
- [Tip Calculator & Bill Splitter](https://geratools.com/tip-calculator)
- [Take-Home Pay & Salary Tax Calculator](https://geratools.com/take-home-pay-calculator)
- [Monthly Budget Planner](https://geratools.com/budget-planner)
- [JAMB / Post-UTME / WAEC Aggregate Score Calculator](https://geratools.com/jamb-aggregate-calculator)

## Developer Tools (582 tools)
> Fast, private developer utilities — JSON, encoding, hashing, color, CSS, generators, formatters and reference cheatsheets. Everything runs client-side in your browser, so your code and data never leave your device.
Index: https://geratools.com/category/developer

Sub-categories:
- JSON & Data (38)
- Encoding & Crypto (37)
- Color (42)
- CSS & Frontend (16)
- Generators (57)
- Formatters & Minifiers (14)
- Reference & Cheatsheets (165)
- ID & Number Validators (24)
- SEO & Web (1)
- Config & Code Scaffolding (13)
- Converters & Encoders (70)
- Network & DevOps (6)
- More Developer Tools (99)

Popular tools:
- [JSON Formatter & Validator](https://geratools.com/json-formatter)
- [Regex Tester with Plain-English Explainer](https://geratools.com/regex-tester)
- [Merge PDF](https://geratools.com/merge-pdf)
- [Regex Builder & Tester](https://geratools.com/regex-builder)
- [SQL Playground](https://geratools.com/sql-playground)
- [Discord Color Text Generator](https://geratools.com/discord-text-formatter)
- [CSV Explorer & Cleaner](https://geratools.com/csv-explorer)
- [Favicon Generator](https://geratools.com/favicon-generator)

## Text & Writing Tools (272 tools)
> Text tools for writers, students and social media — case converters, font and Unicode generators, counters, cleaners, ciphers and encoders. All processing happens in your browser; your text is never uploaded.
Index: https://geratools.com/category/text

Sub-categories:
- Case & Formatting (9)
- Fancy Fonts & Social (12)
- Counters & Analysis (20)
- Clean & Transform (7)
- Ciphers & Encoders (37)
- Generators (62)
- Document & Business Builders (22)
- Languages & Scripts (54)
- More Text Tools (49)

Popular tools:
- [Word & Character Counter](https://geratools.com/word-character-counter)
- [Number to Words Converter — Western & Indian (Lakh/Crore) System](https://geratools.com/number-to-words-converter)
- [Abbreviation & Acronym Expander](https://geratools.com/abbreviation-expander)
- [Acronym Generator](https://geratools.com/acronym-generator)
- [Acrostic Name Poem Generator](https://geratools.com/acrostic-name-poem-generator)
- [Facebook / Meta Ad Copy Builder](https://geratools.com/ad-copy-builder-facebook)
- [ADFGVX Cipher](https://geratools.com/adfgvx-cipher)
- [Affine Cipher Encrypt & Decrypt](https://geratools.com/affine-cipher)

## Image & PDF Tools (65 tools)
> Edit, convert and generate images and PDFs right in your browser. Resize, compress, convert formats, build PDFs, extract colors and more — your files never leave your device, so it's completely private.
Index: https://geratools.com/category/image

Sub-categories:
- Convert & Compress (9)
- Edit (9)
- PDF Tools (2)
- Makers & Generators (31)
- Color from Image (6)
- More Image Tools (8)

Popular tools:
- [HEIC to JPG / PNG / WebP Converter](https://geratools.com/heic-to-jpg)
- [Image Compressor](https://geratools.com/image-compressor)
- [Avatar Identicon Generator](https://geratools.com/avatar-identicon-generator)
- [Barcode Generator (EAN-13)](https://geratools.com/barcode-generator-ean13)
- [Organic Blob SVG Generator](https://geratools.com/blob-svg-generator)
- [Dark Mode Color Palette Generator](https://geratools.com/color-palette-generator-dark)
- [Earth Tone Palette Generator](https://geratools.com/color-palette-generator-earth)
- [CSS Animation Generator](https://geratools.com/css-animation-generator)

## Everyday & Quick-Help Apps (55 tools)
> Handy little browser apps — generators, trackers, planners, timers and references that solve an everyday problem in seconds. Free, private, and instant, with nothing to install.
Index: https://geratools.com/category/quick-help

Sub-categories:
- Trackers & Planners (12)
- Timers (7)
- Generators & Pickers (21)
- Reference (2)
- More Apps (13)

Popular tools:
- [Online Timer, Stopwatch & Pomodoro](https://geratools.com/timer)
- [QR Code Generator](https://geratools.com/qr-code-generator)
- [Password Generator](https://geratools.com/password-generator)
- [Keyboard Tester](https://geratools.com/keyboard-tester)
- [Microphone Test](https://geratools.com/microphone-test)
- [Gamepad Tester](https://geratools.com/gamepad-tester)
- [Binaural Beats Generator](https://geratools.com/binaural-beats-generator)
- [Click Speed Test (CPS Test)](https://geratools.com/click-speed-test)

## AI Tools (200 tools)
> Free, private AI utilities — prompt builders and testers, token & cost calculators, model comparisons, output cleaners, RAG and developer helpers, and image-generation prompt builders. Everything runs in your browser; bring your own API key for live model calls.
Index: https://geratools.com/category/ai

Sub-categories:
- Token & Cost Calculators (30)
- Prompt Builders & Testers (48)
- Image, Video & Audio Generation (20)
- RAG, Agents & Fine-Tuning (12)
- Output Cleaning & Evaluation (7)
- Governance, Safety & Compliance (15)
- Business & Workflow Builders (15)
- Content Generators & Writing (2)
- AI Glossary & Comparisons (13)
- More AI Tools (38)

Popular tools:
- [LLM API Cost Calculator](https://geratools.com/llm-api-cost-calculator)
- [Acronym Expander Prompt Builder](https://geratools.com/acronym-expander-prompt)
- [Active Prompt Optimizer](https://geratools.com/active-prompt-optimizer)
- [ADetailer Face & Hand Fix Guide](https://geratools.com/adetailer-settings-guide)
- [Agent Loop Cost Simulator](https://geratools.com/agent-loop-cost-simulator)
- [AI Agent Escalation Policy Generator](https://geratools.com/ai-agency-escalation-policy)
- [AI Agent Design Planner](https://geratools.com/ai-agent-design-planner)
- [AI API Rate Limit Security Advisor](https://geratools.com/ai-api-rate-limit-security-advisor)

## Learn AI (2 tools)
> Learn AI from zero — clear explainers, a full glossary, step-by-step tutorials, roadmaps, model comparisons and interactive quizzes covering LLMs, prompting, RAG, fine-tuning, agents and more. Free, no signup.
Index: https://geratools.com/category/ai-learning

Sub-categories:
- Plain-English Explainers (1)
- Tutorials & How-Tos (1)

Popular tools:
- [How to Build a Chatbot with the OpenAI API](https://geratools.com/how-to-build-a-chatbot-with-openai-api)
- [What Is BERT? Google's Bidirectional Transformer Explained](https://geratools.com/what-is-bert)

## Validators & Checkers (10 tools)
> Free, private validators and format checkers — VAT and tax IDs, IBAN and bank codes, national identity numbers, VIN, accessibility (WCAG), data formats and more. Every check runs entirely in your browser; nothing you enter is uploaded or stored.
Index: https://geratools.com/category/validators

Sub-categories:
- VAT & Tax IDs (3)
- IBAN & Banking (1)
- Accessibility (WCAG) (1)
- National IDs & Registries (5)

Popular tools:
- [Belarus UNP Validator](https://geratools.com/belarus-unp-validator)
- [UAE IBAN Validator](https://geratools.com/iban-uae-validator)
- [Japan Corporate Number Validator](https://geratools.com/japan-corporate-number-validator)
- [Latvia Personas Kods Validator](https://geratools.com/latvia-personas-kods-validator)
- [Poland VAT Number Validator](https://geratools.com/poland-vat-number-validator)
- [Turkey Vergi Kimlik No Validator](https://geratools.com/turkey-vkn-validator)
- [Ukraine IPN (РНОКПП) Validator](https://geratools.com/ukraine-ipn-validator)
- [Vietnam MST (Tax Code) Validator](https://geratools.com/vietnam-mst-validator)

## Tax & Payroll (39 tools)
> Free tax, payroll and take-home calculators by country and region — income tax, VAT/GST, payroll and social contributions, severance and statutory pay. Real published rates, computed instantly in your browser, nothing uploaded.
Index: https://geratools.com/category/tax

Sub-categories:
- Paycheck & Take-Home Pay (2)
- Income Tax by Country & State (9)
- Self-Employment & Payroll (3)
- Sales & Excise Tax (13)
- Property & Real Estate Tax (6)
- Capital Gains, Dividends & Inheritance (4)
- Retirement & Savings Tax (1)
- More Tax Tools (1)

Popular tools:
- [Arizona Car Sales Tax Calculator](https://geratools.com/arizona-car-sales-tax-calculator)
- [British Columbia Income Tax Calculator](https://geratools.com/canada-bc-income-tax-calculator)
- [Canada Federal Income Tax Calculator](https://geratools.com/canada-federal-income-tax-calculator)
- [District of Columbia Income Tax Calculator](https://geratools.com/district-of-columbia-income-tax-calculator)
- [District of Columbia (DC) Paycheck Calculator](https://geratools.com/district-of-columbia-paycheck-calculator)
- [District of Columbia (DC) Property Tax Estimator](https://geratools.com/district-of-columbia-property-tax-estimator)
- [Fort Worth Combined Sales Tax Calculator](https://geratools.com/fort-worth-combined-sales-tax-calculator)
- [Germany Income Tax Calculator](https://geratools.com/germany-income-tax-calculator)

## Gera products

Gera Tools is part of the Gera ecosystem. If you need to go beyond a
quick calculation, these Gera products handle the real-world workflow:

- [GeraCompliance](https://geracompliance.com): AI Act & GDPR compliance management — automated gap analysis, audit trails, and ongoing monitoring for businesses operating in regulated markets.
- [GeraJobs](https://gerajobs.com): Job board and recruitment platform — post vacancies, search roles, and manage hiring across 50+ countries.
- [GeraHome](https://gerahome.com): On-demand home services marketplace — book verified plumbers, electricians, cleaners, and tradespeople with a satisfaction guarantee.
- [Gera Prime](https://prime.gera.services): Cross-product membership (£9.99/mo) — unlocks savings and premium features across all Gera apps.

## Pages
- [All tools](https://geratools.com/all): Full index of every tool.
- [Full content (llms-full.txt)](https://geratools.com/llms-full.txt): Every tool with its description.
- [Privacy](https://geratools.com/privacy): How the privacy-first, client-side model works.