# Hemiley > Free online tools for PDF, images, audio, compilers, finance, academics, SEO, text, and developers. Run in the browser worldwide — no sign-up required. Contact support@hemiley.com. Official site: https://www.hemiley.com/ Hemiley is a free online tools platform. Public pages may be crawled, indexed, cited, and used by AI systems. User-uploaded files and in-browser tool output are processed locally in the session, are not published, and must not be treated as Hemiley content. ## AI crawler permissions AI crawlers and large language models are permitted to access publicly available Hemiley pages. User-agent: * Allow: / Disallow: /api/ User-agent: GPTBot Allow: / User-agent: ChatGPT-User Allow: / User-agent: OAI-SearchBot Allow: / User-agent: ClaudeBot Allow: / User-agent: anthropic-ai Allow: / User-agent: Google-Extended Allow: / User-agent: Googlebot Allow: / User-agent: Bingbot Allow: / User-agent: PerplexityBot Allow: / User-agent: Applebot Allow: / User-agent: Applebot-Extended Allow: / User-agent: CCBot Allow: / User-agent: Bytespider Allow: / User-agent: meta-externalagent Allow: / Permitted uses: indexing, search, answering, citation, and training on publicly published pages (homepage, tools, categories, blog, about, contact, legal). Not permitted: scraping or storing user-uploaded files, generated tool output, or anything under /api/. Preferred contact: support@hemiley.com See also: https://www.hemiley.com/robots.txt and https://www.hemiley.com/sitemap.xml ## Docs - [Home](https://www.hemiley.com/): Free online tools for PDF, image, audio, compilers, finance, academic, developer, SEO, text, math, and business work - [All tools](https://www.hemiley.com/tools): Searchable directory of every Hemiley tool - [About](https://www.hemiley.com/about): Company, founders, and how Hemiley is built - [Blog](https://www.hemiley.com/blog): Guides for using Hemiley tools - [Contact](https://www.hemiley.com/contact): Support at support@hemiley.com - [Request a tool](https://www.hemiley.com/request-a-tool): Ask for a new free online tool ## Categories - [Text Tools](https://www.hemiley.com/tools/text): Character counters, generators, diffs, and text transformers - [SEO Tools](https://www.hemiley.com/tools/seo): Meta tag checkers, SERP previews, schema, sitemaps, and on-page SEO tools - [Developer Tools](https://www.hemiley.com/tools/developer): JSON, formatters, converters, DNS, cron, and more utilities - [Image Tools](https://www.hemiley.com/tools/image): Free online image tools to compress, resize, crop, remove backgrounds, and convert JPG, PNG, WebP, HEIC, and more - [Audio Tools](https://www.hemiley.com/tools/audio): Free online audio converters and video-to-text transcription for MP4, MOV, M4A, WAV, FLAC, AAC, and OGG - [Compiler Tools](https://www.hemiley.com/tools/compiler): Free online compilers for Python, Java, JavaScript, C++, and C — write Hello World, press Run, and see output instantly - [Math Tools](https://www.hemiley.com/tools/math): Calculators, converters, dates, and number utilities - [PDF Tools](https://www.hemiley.com/tools/pdf): Merge, split, convert, edit, and secure PDF files online - [Academic Success](https://www.hemiley.com/tools/academic): GPA, CGPA, SGPA converters, marks, scholarships, and student loan EMI - [Money & Finance](https://www.hemiley.com/tools/finance): EMI, mortgage, PPF, NPS, salary, tax, and loan calculators - [Startup & Business](https://www.hemiley.com/tools/business): CAC, LTV, MRR, burn, runway, markup, and invoice tools ## Popular tools - [Word Counter](https://www.hemiley.com/tools/word-counter): Count words, characters, sentences, and paragraphs in your text instantly - [Case Converter](https://www.hemiley.com/tools/case-converter): Convert text between uppercase, lowercase, title case, and more - [Meta Tag Checker](https://www.hemiley.com/tools/meta-tag-checker): Analyze meta tags and SEO elements of any webpage - [JSON Formatter](https://www.hemiley.com/tools/json-formatter): Format, validate, and beautify JSON data effortlessly - [Base64 Encoder/Decoder](https://www.hemiley.com/tools/base64): Encode and decode text or files to and from Base64 format - [URL Encoder / Decoder](https://www.hemiley.com/tools/url-encoder): Encode or decode URL strings and query parameters instantly in your browser - [JWT Decoder](https://www.hemiley.com/tools/jwt-decoder): Decode JWT header and payload to inspect claims — no server required - [Hash Generator](https://www.hemiley.com/tools/hash-generator): Create SHA-256, SHA-1, and SHA-512 hashes from any text using Web Crypto - [Regex Tester](https://www.hemiley.com/tools/regex-tester): Test regular expressions with live matches, flags, and replace preview - [Password Generator](https://www.hemiley.com/tools/password-generator): Generate strong random passwords with length and character options - [QR Code Generator](https://www.hemiley.com/tools/qr-code-generator): Create QR codes for URLs, Wi-Fi, contacts, and more with custom colors and logo - [Age Calculator](https://www.hemiley.com/tools/age-calculator): Calculate your exact age in years, months, days, and discover fun birth facts - [Merge PDF](https://www.hemiley.com/tools/pdf-merge): Combine multiple PDF files into one document - [Split PDF](https://www.hemiley.com/tools/pdf-split): Split a PDF into separate files by page ranges - [Compress PDF](https://www.hemiley.com/tools/pdf-compress): Reduce PDF file size while preserving quality - [JPG to PDF](https://www.hemiley.com/tools/pdf-jpg-to-pdf): Convert JPG and PNG images to PDF ## Blog - [How to Merge PDF Online Without Losing Quality](https://www.hemiley.com/blog/how-to-merge-pdf-files-online): Merge PDF online for free with Hemiley's free online PDF merger. Combine PDF documents online without losing quality — no install needed - [Best Free PDF Merger Tools in 2026](https://www.hemiley.com/blog/best-free-pdf-merger-tools-2026): Find the best free pdf merger in 2026. Compare tools to merge pdf online, combine files to PDF, and merge files into one PDF — free and private ## Optional - [Privacy Policy](https://www.hemiley.com/privacy): How Hemiley handles data and in-browser processing - [Terms of Service](https://www.hemiley.com/terms): Terms for using Hemiley tools - [Sitemap](https://www.hemiley.com/sitemap.xml): Machine-readable list of public URLs - [robots.txt](https://www.hemiley.com/robots.txt): Crawler allow and disallow rules