How to Merge PDFs Locally in Your Browser
A practical walkthrough of local PDF merging, ordering, limits, privacy properties, and the cases that still require a full PDF editor.
Read moreβ16 free tools with in-browser processing wherever the tool allows it. No account, no sign-up.
Check your public IP address, geolocation, ISP details, and test your internet speed.
Convert 39 fiat currencies with dated daily reference rates.
Merge, split, compress and convert PDF files online.
Convert between units of length, weight, temperature and more.
Generate QR codes for text, URLs, WiFi, and contacts instantly.
Compress, convert, and resize images online. 100% client-side.
Generate secure passwords with entropy analysis and strength meter.
Word counter, case converter, Base64, URL encoder, and more.
Format, minify, validate, and explore JSON with tree view.
Convert between HEX, RGB, HSL, CMYK. Generate palettes and check contrast.
SHA-2 & SHA-3: SHA-256, SHA-512, SHA3-256, SHA3-512, HMAC.
Convert images to/from Base64. Copy as CSS or HTML.
Generate placeholder text in multiple styles.
Write Markdown with live preview. Export to HTML.
Compare two texts with highlighted differences.
Inspect type, extension, macros, PDF actions, and SHA-256 locally; not a replacement for antivirus.
Reviewed guides with concrete evidence and authoritative sources about the tools and their limits.
A practical walkthrough of local PDF merging, ordering, limits, privacy properties, and the cases that still require a full PDF editor.
Read moreβUnderstand static QR payloads, error correction, quiet zones, sizing, privacy, and how to verify a code before printing it.
Read moreβCompare PNG, JPEG, WebP, and AVIF tradeoffs, understand browser-side re-encoding, and choose settings using repeatable visual checks.
Read moreβLearn how browser speed tests measure transfers, why results vary, and how to run repeatable comparisons without treating one result as an ISP guarantee.
Read moreβUnderstand what your public IP reveals, how private address ranges work, and why IP geolocation is approximate rather than an identity check.
Read moreβUse reference rates correctly, understand provider spreads, and learn exactly where ToolsFree obtains its daily currency data.
Read moreβProfessional-grade tools that run directly in your browser, with no accounts and nothing to install.
Choose from 16 free tools. No sign-up or personal data required.
Your files are processed in your browser whenever the tool supports it; only the network tools (IP, currency, speed test) contact our servers.
Get professional results instantly. Download files or copy to clipboard with one click.
Free tools
Browser-based
Sign-ups required
Languages (EN/ES)
ToolsFree.io offers 16 completely free online tools designed for developers, designers, students, and professionals. From IP lookup and network analysis to PDF editing, currency conversion, QR code generation, image tools, secure password generation, JSON formatting, color picking, cryptographic hash generation, Base64 encoding, Lorem Ipsum generation, Markdown editing, text comparison, and file security analysis.
Browser-based tools offer significant advantages over installed software: they require no download or installation, work on any device with a web browser, update automatically, and consume no disk space. File and text tools process their contents locally, so ToolsFree does not receive that data. IP, currency, maps, and speed features still require the network connections documented in the Privacy Policy.
All tools are instantly accessible with no accounts, email, or personal data required. File-size or item limits are shown beside each tool, and there are no watermarks or locked premium features. Cookie preferences remain available in the footer; in the EEA, UK, and Switzerland, analytics and advertising stay disabled until consent is obtained.
Built with Next.js, React, and modern browser APIs, ToolsFree.io delivers client-side processing with speed comparable to native applications. The responsive design adapts perfectly to mobile, tablet, and desktop. Each tool is optimized to load only the resources it needs, ensuring fast load times even on slow connections.
Beyond the tools, we publish detailed guides, tutorials, and articles about online security, web development, productivity, and best practices. The catalog retains operator-reviewed guides with a visible review date, concrete evidence, and authoritative sources.