Free Online Tools for Text, SEO,
Development & Calculations
One place for every tool you need — robots.txt generator, text anonymizer, PDF converter, financial calculators, SEO analyzers, developer utilities, and more. Everything runs in your browser. Your data stays on your device.
80+
Free Tools
8
Categories
0
Signup Required
100%
Browser-Based
Most Popular Free Online Tools
The tools people use most — all free, all browser-based, no signup.
Robots.txt Generator
Generate a valid robots.txt file for any website. Control which crawlers can access which pages. Free, instant, no upload.
Text Anonymizer & PII Redactor
Remove emails, phone numbers, SSNs, IBAN, IP addresses, and 7 other PII types from any text. GDPR & HIPAA friendly.
PDF to JPG Converter
Convert PDF pages to high-quality JPG images free. Runs entirely in your browser — no file is ever uploaded.
Percentage Calculator
Calculate what % X is of Y, percentage increase/decrease, and reverse percentages — instantly in your browser.
JSON Formatter & Validator
Beautify, minify, and validate JSON. Syntax highlighting and clear error messages. No data sent anywhere.
Keyword Density Checker
Analyse keyword frequency and density in your content. Essential for on-page SEO optimisation.
Browse All Tool Categories
8 categories covering SEO, development, PDF, finance, text, math, conversion, and health.
Optimise your website for search engines. Generate robots.txt files, XML sitemaps, meta tags, and schema markup — and analyse keyword density — all free.
Utilities built for software developers: JSON formatter, QR code generator, password generator, timestamp converter, cron job generator, and more.
Convert, merge, split, and compress PDF files — all in your browser, no file upload required. Includes PDF to JPG, JPG to PDF, and more.
Make better financial decisions with free calculators for loans, mortgages, compound interest, amortization schedules, and e-commerce profitability.
Analyse, anonymize, and audit your text. Remove PII, check readability, count words, and compare two texts side by side.
Fast, accurate math calculators for percentages, discounts, ratios, and more. Get the right answer without doing the arithmetic yourself.
Transform text between formats and styles. Convert case, encode to binary or morse code, generate fancy text, and create CSV from plain text.
Track and understand your health metrics. Calculate BMI, daily calorie needs, pregnancy due date, and more — privately, in your browser.
Why Use Texterfly?
Always Free
Every tool is 100% free. No subscription tiers, no credit card, no premium upsells — just open the tool and use it.
Your Data Stays Private
All tools run in your browser. Your text, files, and inputs are never sent to a server, never logged, never stored. What you type stays on your device.
Instant Results
No upload queues, no server-side delays. Every calculation, conversion, and generation happens instantly in your browser.
Works on Any Device
Fully responsive — use it on desktop, tablet, or mobile. No app download required on iOS or Android.
Built for Professionals
Used by developers, SEO specialists, legal teams, data analysts, and content creators who need reliable tools that just work.
Constantly Growing
New tools and improvements are added regularly based on real user needs. Texterfly is actively maintained.
Free Online Tools Built Around Privacy
Most online tool websites send your data to a remote server to process it. Your sensitive text, private documents, and financial figures pass through infrastructure you don't control. Texterfly was built on a different principle: every tool runs entirely in your browser using JavaScript, WebAssembly, or the Web File API. Nothing is ever uploaded, logged, or stored.
This matters most for tools like the text anonymizer and PII redactor, the PDF to JPG converter, and the robots.txt generator — tools professionals use with data they can't afford to expose. With Texterfly, your data never leaves your device.
Texterfly offers 80+ tools across SEO, development, text processing, PDF management, financial calculations, health metrics, and more — all free, no account, no limits.
Frequently Asked Questions
Are all tools on Texterfly completely free?
Yes. Every tool is 100% free — no hidden costs, no subscription, no account required.
Is my data private when using Texterfly tools?
All processing happens in your web browser. Your text, files, and inputs are never uploaded, never stored, and never transmitted. This applies to every tool including the text anonymizer, PDF tools, and calculators.
Do I need to create an account?
No signup, no login, no account — ever. Open any tool and start using it immediately.
What types of tools does Texterfly offer?
Texterfly has 80+ tools across 8 categories: SEO & Content (robots.txt generator, keyword density checker, meta tag generator), Developer (JSON formatter, QR code generator, password generator), PDF (PDF to JPG, merge, split, compress), Finance (loan, mortgage, compound interest calculators), Text Analysis (anonymizer, readability score, word counter), Math (percentage, discount calculators), Text Conversion (case converter, morse code, binary), and Health (BMI, calorie calculator).
Does Texterfly have a robots.txt generator?
Yes. Create a valid robots.txt file instantly. Configure crawler permissions, crawl delays, and sitemap URLs — then copy or download the result. Free, browser-based, no signup.
Can I use Texterfly on mobile?
Yes. All tools are fully responsive and work on iOS and Android in any modern browser. No app needed.
What is the text anonymizer for?
It detects and redacts PII from text — emails, phone numbers, SSNs, credit card numbers, dates of birth, IBAN numbers, IP addresses, and more. Used for GDPR and HIPAA compliance. All processing is client-side.
Does Texterfly have financial calculators?
Yes: loan calculator, mortgage calculator, compound interest calculator, amortization schedule, and e-commerce profitability calculator. All produce instant results in your browser.
What developer tools are available?
JSON formatter & validator, QR code generator, password generator, timestamp converter, cron job generator, lorem ipsum generator, base64 encoder/decoder, and more.
Can I convert PDF files with Texterfly?
Yes. PDF to JPG, JPG to PDF, merge PDF, split PDF, and compress PDF — all free and browser-based. Your files are never uploaded.
How many tools does Texterfly have?
80+ free tools across 8 categories, with new tools added regularly based on user demand.
Are the SEO tools beginner-friendly?
Yes. The meta tag generator, robots.txt generator, XML sitemap generator, schema markup generator, and alt text generator all have clear instructions and produce ready-to-use output — no technical experience needed.
Social Media Tools
Enhance your social media content with emojis, fancy text, and engaging captions
Emoji Chat Rewriter
Transform your chat messages by creatively incorporating emojis. Make your conversations more engaging and visually appealing.
Emoji Translator
Translate text into a sequence of emojis that convey the original meaning. Express yourself uniquely with visual symbols.
Fancy Text Generator
Create stylish and decorative text using various fonts and symbols. Perfect for enhancing your social media posts, bios, and messages.
Instagram Caption Maker
Generate engaging and creative captions for your Instagram photos and videos. Boost your posts with relevant hashtags and compelling text.
Invisible Text Generator
Copy empty characters to send blank messages on WhatsApp, create invisible names, and troll your friends.