Free tools

Free online tools for marketers, writers and developers

59 calculators, SEO utilities, PDF and image tools. Everything runs in your browser — no sign-up, no watermark, and your files never leave your device.

59 tools8 categories100% free · no upload

📣 Advertising & Growth

4 tools

Analyse campaign efficiency and track the KPIs that decide your marketing spend.

CTR Calculator Work out click-through rate from impressions and clicks in seconds. Open tool → Cost Per Click Calculator Find your average CPC, or the clicks and budget a campaign needs. Open tool → CPA & CPM Calculator Cost per acquisition and cost per thousand impressions, side by side. Open tool → ROAS Calculator Return on ad spend as a ratio and a percentage, with break-even guidance. Open tool →

💼 Business & Revenue

3 tools

Evaluate financial performance, retention and long-term profitability.

ROI Calculator Return on investment with profit, ROI % and annualised return. Open tool → Churn Rate Calculator Customer churn, retention rate and average customer lifetime. Open tool → Customer Lifetime Value Calculator CLV / LTV from order value, purchase frequency, margin and lifespan. Open tool →

✍️ Content & Conversion

5 tools

Sharpen copy, measure satisfaction and lift the rate at which visitors act.

Conversion Rate Calculator Conversion rate from visitors and conversions, plus uplift planning. Open tool → NPS Calculator Net Promoter Score from promoter, passive and detractor counts. Open tool → Word Counter Words, characters, sentences, paragraphs, reading time and keyword density. Open tool → Lorem Ipsum Generator Placeholder paragraphs, sentences or words for mock-ups and layouts. Open tool → Meta Title & Description Checker Preview your Google snippet and check title and description lengths. Open tool →

🛠️ Technical & Web Utilities

4 tools

Check redirects and caching, generate secure passwords and tidy up URLs.

Redirect Checker Trace 301/302 chains, final URL, status codes and response headers. Open tool → Website Cache Checker See whether a page is served from cache, by which CDN, and for how long. Open tool → Password Generator Strong random passwords and passphrases generated locally in your browser. Open tool → URL Slug Generator Turn any title into a clean, SEO-friendly URL slug. Open tool →

📄 PDF Tools

14 tools

Merge, split, compress, rotate and convert PDFs — all in your browser, nothing is uploaded.

Merge PDF Combine several PDFs into one file, in the order you choose. Open tool → Split PDF Extract page ranges or split every page into its own PDF. Open tool → Compress PDF Shrink PDF size for email and uploads with adjustable quality. Open tool → Rotate PDF Rotate all pages or selected pages by 90°, 180° or 270° and save. Open tool → PDF to JPG Convert every PDF page to a high-quality JPG or PNG image. Open tool → JPG to PDF Combine JPG, PNG or WebP images into a single PDF document. Open tool → Add Watermark to PDF Stamp text like CONFIDENTIAL or your brand name across every page. Open tool → Add Page Numbers to PDF Insert page numbers in the header or footer of every page. Open tool → Organize PDF Pages Reorder, duplicate or delete pages with a simple page list. Open tool → Crop PDF Trim margins from every page by millimetres or percentage. Open tool → PDF to Text Extract all text from a PDF and copy it or download a .txt file. Open tool → Text to PDF Turn plain text or notes into a clean, printable PDF. Open tool → Unlock PDF Remove the open password from a PDF you have the password for. Open tool → PDF Info & Page Counter Page count, page sizes, metadata, fonts and whether text is selectable. Open tool →

🖼️ Image Tools

9 tools

Compress, resize and convert JPG, PNG and WebP images privately on your device.

Image Compressor Compress JPG, PNG and WebP images by up to 90% without visible loss. Open tool → Image Resizer Resize images by pixels or percentage, keeping the aspect ratio. Open tool → Image Converter Convert any image — HEIC, TIFF, SVG, AVIF, ICO, BMP, GIF, JPG, PNG, WebP — to the format you need. Open tool → WebP Converter Convert JPG/PNG to WebP — or WebP back to JPG and PNG. Open tool → Rotate & Flip Image Rotate by 90°/180° or any angle and flip horizontally or vertically. Open tool → Crop Image Crop to any area or a preset ratio (1:1, 4:3, 16:9, passport). Open tool → Image to Base64 Convert an image to a Base64 data URI for CSS, HTML or JSON. Open tool → Favicon Generator Make favicon.ico plus all PNG sizes (16–512) and the HTML tags. Open tool → Image Colour Picker Click any pixel to get its HEX/RGB, plus the image's dominant palette. Open tool →

🧮 Everyday Calculators

8 tools

GST, EMI, SIP, percentage, age, BMI and discount calculators for daily decisions.

GST Calculator Add or remove GST at 5%, 12%, 18% or 28% with CGST/SGST split. Open tool → EMI Calculator Monthly EMI, total interest and amortisation for home, car and personal loans. Open tool → SIP Calculator Future value of monthly mutual-fund SIPs, plus lump-sum growth. Open tool → Percentage Calculator What is X% of Y, X is what % of Y, and percentage change. Open tool → Discount Calculator Final price after a percentage or flat discount, and how much you save. Open tool → Age Calculator Exact age in years, months and days, plus next birthday countdown. Open tool → BMI Calculator Body mass index from height and weight, with WHO and Asian-Indian ranges. Open tool → Unit Converter Length, weight, temperature, area, volume, speed and data units. Open tool →

💻 Developer & Text Tools

12 tools

QR codes, JSON, Base64, URL encoding, hashes, UUIDs, colours, timestamps and text clean-up.

QR Code Generator QR codes for URLs, text, Wi-Fi, UPI payments, phone and email — as PNG or SVG. Open tool → JSON Formatter & Validator Pretty-print, minify and validate JSON with clear error positions. Open tool → Base64 Encode / Decode Encode text to Base64 or decode Base64 back to text (UTF-8 safe). Open tool → URL Encoder / Decoder Percent-encode text for URLs or decode encoded URLs back to plain text. Open tool → Case Converter UPPER, lower, Title Case, Sentence case, camelCase, snake_case, kebab-case. Open tool → Text Cleaner & Line Tools Remove duplicate lines, blank lines and extra spaces; sort, reverse, number lines. Open tool → Hash Generator MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes of text or files. Open tool → UUID Generator Generate one or hundreds of random UUID v4 identifiers. Open tool → Colour Converter HEX ↔ RGB ↔ HSL with live preview, shades, tints and contrast check. Open tool → Unix Timestamp Converter Epoch seconds/milliseconds ↔ human dates in IST, UTC and your zone. Open tool → CSS & JS Minifier Strip comments and whitespace from CSS or JavaScript to shrink files. Open tool → Robots.txt Generator Build a correct robots.txt with allow/disallow rules, sitemap and AI-bot options. Open tool →

Why use 24SevenUpdates tools?

🔒 Private by design

PDF and image tools process files with JavaScript on your own device. Nothing is uploaded, stored or shared — safe for contracts, ID documents and client photos.

⚡ Instant, no sign-up

No accounts, no email walls, no daily limits and no watermarks. Open a tool, get the answer, move on.

📚 Built for real work

Every calculator shows its formula, benchmarks and worked examples, so you understand the number — not just get it.