100+ Free Online Tools for
Everyday Tasks
Edit PDFs, compress images, convert files, calculate values, format code, generate QR codes, optimize SEO, and much more — fast, free, and private.
All Tools (100+)
PDF Merge
Combine multiple PDF files into one clean document in seconds.
PDF Splitter
Split specific page ranges or extract individual pages from a PDF document.
Image to PDF
Convert JPG, PNG, WEBP images into clean PDF files instantly.
Text to PDF
Convert plain text, notes, or code directly into a clean PDF file.
PDF Page Rotator
Rotate upside-down or sideways PDF pages by 90, 180, or 270 degrees.
PDF Watermark Generator
Add custom text watermarks across PDF pages to protect confidentiality.
PDF Page Numberer
Add header or footer page numbers to PDF documents automatically.
PDF Metadata Inspector
View and edit title, author, subject, keywords, and creation dates of PDFs.
PDF Page Extractor
Extract text and pages as high-resolution images or TXT downloads.
Delete PDF Pages
Remove unwanted pages or blank cover sheets from any PDF file.
PDF Compressor Optimizer
Reduce PDF file size by optimizing embedded resources and image dpi.
PDF Security & Password Info
Inspect PDF security settings, permissions, and restriction details.
Image Compressor
Compress JPEG, PNG, WEBP images up to 80% without visible quality loss.
Image Resizer
Resize images by width, height, percentage, or specific aspect ratios.
Image Cropper
Crop images to standard ratios (1:1, 16:9, 4:3) or custom pixel areas.
Image Format Converter
Convert between PNG, JPG, WEBP, BMP, and SVG formats instantly.
Image Color Picker & Palette
Pick colors from any image and extract dominant HEX/RGB palettes.
Image Background Remover
Remove solid backgrounds or isolate subjects using color threshold masking.
Image Watermark Adder
Add custom text or image logos to photos to protect intellectual property.
Image Filter Studio
Adjust brightness, contrast, saturation, grayscale, sepia, and blur.
Image EXIF Metadata Viewer
View camera model, shutter speed, ISO, focal length, and GPS data of photos.
Image Rotate & Flip
Rotate images by 90/180/270 degrees or flip horizontally/vertically.
Aspect Ratio Calculator
Calculate proportional dimensions for 16:9, 4:3, 1:1, or custom aspect ratios.
SVG Viewer & Code Cleaner
Preview, clean, sanitize, and optimize vector SVG code.
Favicon Generator
Generate 16x16, 32x32, 180x180, and ICO/PNG favicons for websites.
Image to Base64 String
Encode image files into data URI base64 strings for CSS or HTML embedding.
Base64 to Image Converter
Decode base64 data strings back into viewable and downloadable image files.
Word & Character Counter
Count words, characters, sentences, paragraphs, and reading duration.
Text Case Converter
Convert text to UPPERCASE, lowercase, Title Case, camelCase, kebab-case, snake_case.
Remove Duplicate Lines
Deduplicate text lists, remove empty lines, and trim whitespace.
Reverse Text Generator
Flip characters, words, or sentence order backwards instantly.
Text Diff Checker
Compare two text passages or code files and highlight additions or deletions.
Lorem Ipsum Generator
Generate placeholder text by paragraphs, words, sentences, or lists.
Line Sorter & Deduplicator
Sort lines alphabetically (A-Z or Z-A), numerically, or by line length.
URL Slug Generator
Convert article titles and headings into clean SEO-friendly URL slugs.
Find & Replace Tool
Find and replace matching strings or regex patterns across text passages.
Text to Speech Reader
Listen to written text read aloud with customizable voice, pitch, and speed.
Reading Time Calculator
Estimate silent reading and speech duration based on word count.
Word & Character Frequency
Analyze word occurrence percentages and character distribution.
Fancy Font Generator
Convert normal text into cool Unicode styles for Instagram, Twitter, and bios.
Binary / ASCII Converter
Convert text to binary 0s and 1s or decode binary strings back to ASCII text.
Whitespace & HTML Stripper
Strip HTML tags, extra spaces, line breaks, or invisible formatting characters.
JSON Formatter & Validator
Format, prettify, minify, and validate JSON data with line numbers and syntax check.
JSON to CSV Converter
Convert JSON arrays or objects into structured CSV files for Excel/Spreadsheets.
CSV to JSON Converter
Parse CSV files or raw spreadsheet tables into formatted JSON objects.
HTML Formatter & Minifier
Minify HTML code to reduce page size or format raw HTML with indentation.
CSS Minifier & Formatter
Compress CSS stylesheets or format CSS code with tidy selector indentation.
JavaScript Minifier
Safely compress JavaScript code by stripping comments and unnecessary whitespace.
XML Formatter & Prettifier
Indent and validate XML strings or minifying XML layouts.
URL Encoder / Decoder
Encode special characters into %20 URI query components or decode encoded URLs.
Base64 String Encoder / Decoder
Encode plain text strings into Base64 format or decode Base64 strings back to UTF-8.
Regex Tester & Debugger
Test Javascript regular expressions with live regex match highlighting and flags.
JWT Token Decoder
Decode JSON Web Tokens (JWT) to inspect header, payload claims, and expiration.
cURL to Fetch / Axios
Convert cURL terminal commands into JavaScript fetch, Axios, or Python requests code.
Unix Timestamp / Epoch Converter
Convert seconds/milliseconds Unix epoch timestamps to human readable dates.
UUID / GUID v4 Generator
Generate bulk cryptographically secure UUID version-4 strings.
Hash Generator (MD5, SHA-256)
Generate MD5, SHA-1, SHA-256, and SHA-512 cryptographic hashes.
20 High Quality Backlink Creator
Generate, submit, and ping 20 high-authority DA 80-99 backlinks & web directories for fast indexing.
Spam Score Link Checker & Disavow Remover
Detect high spam score toxic backlinks and generate Google Disavow files to remove search penalties.
Open Graph & Meta Tag Generator
Generate SEO title, description, Open Graph, and Twitter Card HTML tags.
Robots.txt Generator
Create compliant robots.txt files to manage search crawler indexing permissions.
XML Sitemap Generator
Generate valid XML sitemaps with custom page priorities and change frequencies.
Keyword Density Analyzer
Analyze keyword frequency percentages, 1-word, 2-word, and 3-word n-grams.
Google SERP Preview Simulator
Preview how your web page title and description will look on Google desktop & mobile.
HTTP Header Inspector Info
Inspect HTTP response header fields like HSTS, CSP, and Cache-Control.
Canonical Tag Generator
Generate rel="canonical" HTML link tags to prevent duplicate content issues.
Hreflang Tag Generator
Build multi-language and multi-region hreflang link tags.
HTTP Redirect Path Info
Learn about 301 permanent vs 302 temporary redirects for SEO authority.
Domain DNS & IP Info Helper
Look up A records, CNAMEs, and DNS lookup reference guides.
Schema.org JSON-LD Builder
Generate FAQ, Article, Organization, and Product JSON-LD structured data.
Age Calculator
Calculate exact age in years, months, days, hours, and total leap years.
BMI & Fitness Calculator
Calculate Body Mass Index (BMI), ideal weight range, and WHO weight categories.
Loan & EMI Calculator
Calculate monthly home, car, or personal loan repayments with interest breakdown.
Percentage & Discount Calculator
Calculate percentage increase, decrease, percentage of value, or ratio.
GST / Sales Tax Calculator
Calculate Inclusive or Exclusive GST/Sales tax rates (5%, 12%, 18%, 28%).
Compound Interest Calculator
Calculate investment growth with annual/monthly compounding and extra deposits.
Time & Date Duration Calculator
Calculate exact time duration or business days between two dates.
Universal Unit Converter
Convert Length, Mass/Weight, Temperature, Area, Speed, and Volume.
Tip & Bill Split Calculator
Calculate restaurant tip percentage and split total bill equally among friends.
Calorie & BMR Calculator
Calculate Basal Metabolic Rate (BMR) and daily maintenance calories.
GPA / Grade Calculator
Calculate High School or College Grade Point Average (4.0 scale).
Scientific Web Calculator
Full scientific calculator with trigonometric, logarithmic, and power functions.
Shopping Sale Discount Calculator
Calculate final price after double discounts or promotional coupon codes.
Salary & Hourly Pay Estimator
Convert hourly wage to annual salary or monthly gross income.
Multi-Currency Converter Simulator
Convert between USD, EUR, GBP, JPY, CAD, AUD, INR exchange rates.
Strong Password Generator
Generate cryptographically strong passwords with custom length and character sets.
Password Strength & Entropy Analyzer
Check how long it would take a brute-force computer to crack your password.
MD5 Hash Generator
Generate 128-bit MD5 message digest string for any text input.
SHA-256 Hash Generator
Generate secure 256-bit SHA-256 cryptographic hashes instantly.
HMAC Signature Generator
Generate Keyed-Hash Message Authentication Code (HMAC-SHA256).
API Key & Token Generator
Generate random hex, base64, or alphanumeric API keys and secret tokens.
Base64 Obfuscator
Quickly encode and decode sensitive strings using Base64 obfuscation.
Browser File Checksum Hasher
Calculate MD5 and SHA-256 checksums of local files without uploading them.
CORS Headers & Origin Tester
Inspect cross-origin resource sharing (CORS) rules and headers.
SSL / TLS Certificate Inspector Info
Learn about HTTPS certificate validation, TLS 1.3, and SSL security.
AI Text Summarizer
Summarize long articles, PDFs, or notes into key bullet points powered by Gemini.
AI Grammar & Style Improver
Fix grammatical errors, polish spelling, and rewrite text into professional tone.
AI Code Explainer & Fixer
Explain complex code snippets line-by-line or detect syntax bugs automatically.
AI Regex Pattern Builder
Describe what text pattern you want to match in plain English and get Regex code.
AI SQL Query Generator
Convert plain text descriptions into optimized SQL queries for Postgres or MySQL.
AI Meta Description Writer
Generate high-CTR SEO page titles and 155-character meta descriptions.
AI Excel & Sheets Formula Builder
Generate complex Excel or Google Sheets VLOOKUP, INDEX MATCH, or IF formulas.
AI Email & Response Writer
Draft polite customer support responses, follow-up emails, or formal requests.
AI Contextual Multilingual Translator
Translate text accurately between 30+ languages maintaining natural idioms.
AI Smart Tool Recommendation Engine
Describe your workflow or problem and get recommended tools from Biren suite.
Explore Tool Categories
Browse our organized library of 100+ browser-side utility tools
PDF Tools
Merge, split, convert, rotate, and manage PDF documents directly in browser.
Image Tools
Compress, resize, convert, crop, and edit images without server uploads.
Text & Content
Word counters, case converters, line deduplicators, text diffing, and formatting.
Developer Tools
JSON formatters, minifiers, regex testers, JWT decoders, and code utilities.
SEO & Webmaster
Meta tag builders, spam link remover, robots.txt, sitemaps, SERP previewers, and backlink suites.
Calculators & Math
Age, BMI, EMI, percentage, GST, compound interest, and unit converters.
Security & Hashes
Password generators, SHA256, MD5, JWT decoders, and browser file hashing.
AI Smart Tools
AI code explainer, text summarizer, regex builder, formula writer, and SQL creator.
Why Choose Biren Multi Tool?
Designed for speed, maximum privacy, and effortless productivity.
Lightning Fast
Zero server uploads or latency. All file operations execute instantly using HTML5 and JavaScript.
100% Privacy First
Your files, photos, and documents never leave your browser. Zero data tracking or external logging.
Free Forever
No hidden paywalls, subscription fees, or feature locks. Use all 100+ online utilities for free.
No Login Required
Skip annoying sign-up forms and passwords. Start using any tool instantly with one click.
Mobile Friendly
Responsive, mobile-optimized user interfaces designed for phone screens, tablets, and desktops.
Gemini AI Assistant
Integrated Gemini AI engine to help you summarize text, fix code, and generate formulas on demand.
How Biren Tools Work
Simple 3-step workflow with zero learning curve.
Select or Search Tool
Choose from 100+ organized utilities or use ⌘K instant search to locate your tool in seconds.
Upload or Input Data
Drag & drop files, images, or paste text. All processing occurs 100% inside your browser.
Get Instant Result
Download converted PDFs, optimized images, formatted JSON, or copy generated output.
Frequently Asked Questions
Everything you need to know about Biren Multi Tool.