The free tool library that never uploads your files
Open Tools Library is a home for every everyday tool you shouldn't need to install software for — all 12 tool categories are live today, with new tools added every week.
Free and ready today
From PDFs to developer tools
No premium tier, no paywall
Everything runs in your browser
Open a tool and start immediately
Powering every tool, for free
Explore every category
All 12 categories are live today, packed with tools that work entirely in your browser.
PDF Tools
Merge, split, compress, convert, sign, and edit PDF files entirely in your browser. No uploads, no waiting, no signup.
Image Tools
Remove a photo's background with a real AI model, resize, compress, and convert images between JPG, PNG, and WEBP, plus convert images to PDF and back — all today, in your browser.
Video Tools
Grab frames from a video, record your screen, convert a clip to GIF, and compress a video's file size — all today, in your browser.
File Converters
Convert CSV to JSON, Markdown to HTML, and YAML to JSON (and back), plus image and document formats — all today, in your browser.
Text & Writing Tools
Word and character counters, case converters, slug generators, and lorem ipsum — free, private, and packed with more depth than the usual text tools.
Developer Tools
Format and validate JSON, convert XML to JSON, encode or decode Base64, test regex, convert Unix timestamps, diff two blocks of text, and parse cron expressions — all today, in your browser.
Calculators & Finance
Calculate percentages (including stacked discounts), split a tip fairly, work out loan payments with a full amortization schedule, and project compound interest growth — all today, in your browser.
SEO Tools
Generate meta tags, robots.txt, XML sitemaps, and clean URL slugs — all today, in your browser.
Security & Privacy
Strengthen a memorable password, check for phishing and lookalike URLs, inspect suspicious files, audit SPF/DKIM/DMARC and HTTP security headers, check a server's live TLS configuration, encrypt files with AES-256, generate 2FA codes, decode JWTs and SSL certificates, analyze email headers, and generate secure tokens — all today, in your browser.
Documents & Templates
Create an invoice, quote, or receipt with a real downloadable PDF, or check a resume the way an ATS actually parses it — all in your browser, nothing saved to a server.
AI Tools
Summarize text, extract keywords, listen with text-to-speech, count tokens for GPT-4 and Claude, check or build a well-structured prompt, and check a photo for real AI-generation signals — smart, algorithm-powered tools, all today, in your browser.
Design & Color Tools
Pick and convert colors, check WCAG contrast, generate color palettes, and create custom QR codes — plus placeholder text for mockups — all today, in your browser.
Can't find what you need? Request a tool →
Popular tools right now
Our most-used tools this week, all processed locally in your browser — no upload, no wait.
Merge PDF
Combine multiple PDF files into a single document, in any order you choose.
Image Compressor
Reduce JPG, PNG, or WEBP file size with an adjustable quality slider and an instant before/after size preview, all processed locally in your browser.
Video to GIF Converter
Convert a video clip into an animated GIF with control over frame rate, size, color count, and dithering, encoded by a real from-scratch GIF89a/LZW compressor running entirely in your browser.
URL to Markdown Converter
Paste a webpage URL and get back clean Markdown of just the article content, with navigation, ads, and sidebars automatically stripped out — then export it straight to PDF, Word, HTML, or plain text.
Word Counter
Count words, characters, sentences, and paragraphs live as you type, plus get a Flesch readability grade and a stopword-filtered keyword density report.
Cron Expression Generator & Parser
Paste any cron expression to get a plain-English description, a field-by-field breakdown, and the next 8 upcoming run times in your local timezone — or start from a quick preset like "every 5 minutes" or "weekdays at 9am" and build one from scratch.
Loan / EMI Calculator
Calculate your monthly loan payment, see the complete amortization schedule broken down by year or month, and find out exactly how much time and interest an extra monthly payment would save.
Meta Tag Generator
Build a complete, correctly formatted set of meta tags — title, description, canonical URL, Open Graph, and Twitter Card — with live previews of how the page will look in Google search results and when shared on social media.
Memorable Password Strengthener
Type a word you already know you'll remember — a pet's name, a favorite place — and turn it into a strong password using look-alike character substitution (a→@, o→0, i→!, and more), with a plain-English breakdown of every change, a genuine entropy-based strength score, and an honest note if substitution alone isn't enough.
Text Summarizer
Condense any article or document down to its most important sentences using a transparent ranking algorithm — adjust the summary length with a slider, switch between key-sentence, stats-only, and quotes-only lenses, and see the relevance score behind every sentence.
QR Code Generator
Generate scannable QR codes for URLs, WhatsApp, Google Reviews, contact cards, calendar events, location, email, phone, SMS, Wi-Fi logins, or plain text — with a center logo, solid or gradient colors, and PNG, SVG, or PDF download, encoded from scratch entirely in your browser.
Have an idea for a tool we should build next? Suggest a tool →
Why people use Open Tools Library
Four principles guide every tool we build — no exceptions, no fine print.
Privacy First
Every tool runs as JavaScript in your own browser tab. Your files are read, processed, and written back to your device without ever touching a server — we couldn't see them if we wanted to.
See how it works→Instant, No Waiting
There's no upload queue, no server processing time, and no download link that expires. Your file is ready the moment the local processing finishes — usually well under a second.
Try Merge PDF→Always Free
No premium tier, no page limits hidden behind a paywall, no credit card required. Every tool on this site is free to use, for as long as the site exists.
How we stay free→No Sign-up Required
Just open a tool and use it. We don't ask for an account, an email address, or any personal information to process your files.
Browse PDF tools→How it works
Three steps, no detours. No account screen, no upload progress bar, no ads to click through before you get to the tool.
Pick a tool
Browse by category, use the mega-menu, or search for exactly what you need — every tool is one click away from anywhere on the site.
Add your file
Drag and drop, or click to select. Your file loads straight into your browser's memory — there's no upload bar because there's nothing to upload.
Download the result
Processing happens instantly on your device, usually in well under a second. Grab your file and go — nothing is stored, logged, or kept.
PDF Tools — our most complete category so far
PDF is the first category we built end-to-end: combining, splitting, and shrinking PDF files without installing Adobe Acrobat or any other desktop software. Every tool below runs fully client-side, in your browser tab.
Merge PDF
Combine multiple PDF files into a single document, in any order you choose.
Open tool→Split PDF
Extract a page range from a PDF, or split every page into its own file.
Open tool→Compress PDF
Reduce PDF file size for easier sharing and uploading — all in your browser.
Open tool→PDF to Word Converter
Extract the text from a PDF — even scanned ones, via built-in OCR — and download it as an editable .docx Word file, right in your browser.
Open tool→Word to PDF Converter
Convert a .docx file into a real, vector PDF with selectable and searchable text — built on a from-scratch DOCX parser and PDF layout engine, not a rasterized screenshot. Preserves formatting, headings, lists, tables, images, and clickable hyperlinks, entirely in your browser.
Open tool→JPG to PDF Converter
Combine one or more images into a single PDF, with no stretching, no wrong-way-up photos, and no quality loss — all in your browser.
Open tool→Image to PDF Converter
Bundle any mix of images — screenshots, graphics, PNGs, WEBP, and more — into a single, well-formed PDF, entirely in your browser.
Open tool→PDF to Image Converter
Convert every page of a PDF into a separate image, in the format and resolution you choose, all in your browser.
Open tool→PDF to JPG Converter
Convert every page of a PDF into a JPG image, at the resolution you choose, entirely in your browser. The smallest file size of the three formats, and accepted absolutely everywhere.
Open tool→PDF to PNG Converter
Convert every page of a PDF into a lossless PNG image, at the resolution you choose, entirely in your browser. Ideal for pages with text, diagrams, or line art where compression artifacts would show.
Open tool→PDF to WEBP Converter
Convert every page of a PDF into a WEBP image, at the resolution you choose, entirely in your browser. Modern format that beats JPG and PNG on file size at comparable quality.
Open tool→Online PDF Editor
Add text, highlight or whiteout content, draw, insert images, and rotate or delete pages — directly in your browser, then save a new PDF.
Open tool→Sign PDF
Create a signature by drawing it, typing it in a handwriting-style font, or uploading a photo of it, then drag it onto any page and save.
Open tool→Why use free online PDF tools?
The old way
PDF has become the default format for anything that needs to look the same on every device — contracts, invoices, resumes, scanned forms, textbooks. But the tools to actually manipulate a PDF have historically meant either paying for desktop software like Adobe Acrobat, or uploading a sensitive document to an unfamiliar website and hoping it gets deleted afterward.
“If your browser can open the page, it can run the tool.”
The browser-based way
Modern browsers are powerful enough to merge, split, convert, sign, and edit a PDF using nothing but JavaScript running on your own device — no installation, no upload, no account. That's the entire premise behind the PDF tools on this site: give you the operations people need most often (combine files, pull out a few pages, shrink a file to email it, turn it into a Word doc, sign it) without the friction of desktop software or the privacy trade-off of a server-based converter.
Works anywhere
It also means these tools work the same whether you're on a work laptop that won't let you install new software, a shared library computer, or your phone between classes.
Built for how people actually work
Four everyday situations where a browser tool beats installing software.
Students
Merge lecture notes into one PDF before an exam, split a huge scanned textbook into chapters, or shrink a file so it fits your college's upload limit.
"Merged 6 weeks of lecture slides into one file the night before finals."
Try Merge PDF→Professionals
Combine signed contracts and invoices into a single document, or compress a report before emailing it — all without installing desktop software.
"Compressed a 40MB proposal to under 5MB before it bounced from a client's inbox."
Try Compress PDF→Small businesses
Prepare client-ready documents on the fly, from any device, without paying for a PDF software license per seat.
"No per-seat Acrobat license needed for a 3-person team."
Try Merge PDF→Developers & IT teams
Quickly reshape documents as part of a workflow without scripting a one-off solution — and without sending internal files to a third-party server.
"Split an internal audit PDF into per-department files in seconds."
Try Split PDF→Your files never leave your device
Most “free online tool” sites work by uploading your file to a server, processing it there, and sending back a result — which means your document, however briefly, sits on someone else's infrastructure. Every tool on this site is built the other way around: the processing code runs directly inside your browser tab.
Practically, that means: if you open your browser's network tab while merging a PDF here, you won't see your file being sent anywhere. It's read from your disk, processed in memory, and written back out — no round trip to a server, no matter which category of tool you're using.
Read our full privacy policy →What this means in practice
- No upload step, so no waiting on your internet connection for large files.
- Nothing to delete afterward — there was never a copy stored anywhere.
- Works even on a slow or unstable connection, since only the page itself loads over the network.
- Sensitive documents — contracts, IDs, medical forms — never sit on a third-party server, even temporarily.
- This principle applies to every category we build, not just the tools live today.
Is it safe to use free online tools?
It's a fair question — a lot of “free online tool” sites have earned skepticism over the years, whether from intrusive ads, sketchy downloads, or unclear data handling. Here's exactly what happens — and doesn't happen — when you use a tool here.
The site is served over HTTPS, so the connection between your browser and this page is encrypted. The tools themselves are built on established open-source libraries rather than custom file-parsing code, which reduces the chance of the kind of bugs that cause security issues in file processing. And because processing happens locally, there is no upload step where a file could be intercepted, logged, or retained on a server.
Nothing here asks you to download or install an executable — every tool runs as a web page, for every category we build. If a “PDF tool” or any other tool ever asks you to download a program to your computer, that's a red flag; the tools on this site never will.
HTTPS encrypted
Open-source engines
No installs, ever
No server-side storage
How do we keep this free?
This site is supported by non-intrusive display advertising, not subscriptions or data sales. Since your files are processed entirely on your own device, there's no user data from your documents for us to collect or sell in the first place — the ads that keep the lights on are completely unrelated to what you actually process here. That model doesn't change as we add more categories: every tool we ship, today and years from now, stays free to use.
More on how we handle data →Browser tools vs. desktop software
For everyday, occasional tasks, a browser-based tool is often simpler than installing a full desktop application just to complete one job.
| Desktop software | Open Tools Library | |
|---|---|---|
| Cost | One-time or subscription fee, per app | Free |
| Installation | Required, per device | None — just open a page |
| Your files | Stored on that device | Processed in-memory for nearly every tool |
| Updates | Manual, sometimes paid | Automatic |
| Works on | Whichever OS it supports | Any modern browser |
| Switching tasks | A separate app per task (PDF editor, image editor, converter…) | One library, every tool |
Works on any device
One link, every screen. No separate mobile app, no desktop-only features.
Desktop
Windows, macOS, or Linux — any modern browser.
Mobile
Works in your phone's browser, no app install needed.
Tablet & Chromebook
Same tools, same privacy, smaller screen.
Locked-down work laptops
No admin rights needed — nothing installs.
Supported file types
PDF, image, video, document, and developer data formats are fully supported today, across every category.
Need a format you don't see here? Let us know →
One library. Every tool you'll ever need.
Instead of bookmarking a dozen different single-purpose sites, the goal here is simple: one destination that eventually covers PDF, images, video, developer utilities, calculators, and everything in between — all with the same privacy-first, no-signup standard.
PDF ToolsLive
Merge multiple files into one, split a document into pages, or shrink a file before emailing it — the PDF operations people need most often, done without installing anything.
Explore now→Image ToolsLive
Resizing a photo for a website, compressing it for faster loading, or converting between JPG, PNG, and WebP shouldn't require desktop editing software — this category covers the everyday image tasks people reach for a browser to do.
Explore now→Video ToolsLive
Trimming a clip, compressing a video for sharing, or converting between formats, handled locally so large video files never have to be uploaded anywhere.
Explore now→File ConvertersLive
Bridging the gap between formats — document to document, data to data — for the moments a file needs to be something else before you can use it.
Explore now→Text & Writing ToolsLive
Word counts, case conversion, whitespace cleanup, and other small text transformations that are tedious to do by hand but trivial for a script.
Explore now→Developer ToolsLive
JSON formatting, encoding/decoding, and regex testing — the small utilities developers reach for dozens of times a week, without a context switch to a separate app.
Explore now→Calculators & FinanceLive
Loan payments, tax estimates, percentages, unit conversions — everyday math made a little less tedious.
Explore now→SEO ToolsLive
Meta tag previews, basic on-page checks, and keyword utilities for anyone maintaining a website without an enterprise SEO subscription.
Explore now→Security & PrivacyLive
Generating strong passwords, hashing text, and other small security utilities that shouldn't require trusting a third-party server with sensitive input.
Explore now→Documents & TemplatesLive
Invoices, quotes, and receipts with a live preview and a real PDF export, remembering your business and client details for next time.
Explore now→AI ToolsLive
Lightweight AI-assisted writing and summarizing helpers for quick tasks that don't need a full chatbot subscription.
Explore now→Design & Color ToolsLive
Color pickers, palette generation, and other small design utilities for people who aren't designers but occasionally need to think like one.
Explore now→Every category, delivered
We set out to cover every everyday tool category, one at a time, finishing each before starting the next — and every one of them is live today.
Live now
PDF tips & best practices
Small habits that save real time once you know them.
- 1Compress before emailing — most mail providers cap attachments around 20–25MB, and scanned PDFs are usually the culprit.
- 2Merge in the right order the first time — reordering after merging means starting over, so use the up/down arrows before you click merge.
- 3Extracting a single page is often faster than converting the whole document to images and back.
- 4If a PDF is mostly scanned pages, compressing it will shrink the file far more than a text-heavy document.
- 5Keep an uncompressed original on hand — compression in this tool rasterizes pages, which trades selectable text for smaller size.
A few terms explained
No jargon left unexplained — the handful of technical terms that show up across this site, in plain English.
- Client-side processing
- Running code in your browser instead of on a remote server. It's why these tools work instantly and never see your files.
- Lossless vs. lossy compression
- Lossless compression shrinks a file without discarding any information (used when merging or splitting). Lossy compression discards some detail to save more space (used when compressing).
- Rasterizing a page
- Converting a page's content — including any selectable text — into a flat image. This is how our Compress PDF tool achieves large size reductions on scanned documents.
- MIME type
- A label like application/pdf that tells a browser or server what kind of file it's dealing with, used internally when validating uploads.
- Local-first software
- Software designed to run and store data on your own device by default, syncing to a server only if you explicitly choose to. Every tool here is local-first.
- k-anonymity
- The privacy technique behind our password breach checks: your password is hashed in your browser, and only the first 5 characters of that hash are ever sent over the network — never your actual password, and never enough to identify it.
What people look for
Jump straight to the tool behind the search — every phrase below leads to a live, working tool.
Built in the open, one category at a time
Open Tools Library started as a simple idea: the tools people use most — merging a PDF, resizing an image, formatting some JSON — don't need to be locked behind software installs, accounts, or a trip through someone else's server. The goal is to become the one place you bookmark for any everyday tool, instead of hunting down a different site for every single task.
We're building it out deliberately, category by category, finishing each one before starting the next — so what's live is always genuinely usable, never a placeholder. That's slower than launching everything half-built on day one. We think it's worth it.
Frequently asked questions
Is this website really free?
Yes. Every tool is free to use with no limits hidden behind a paywall. The site is supported by advertising, not subscriptions.
Do I need to create an account?
No. You can use every tool immediately without signing up or providing any personal information.
Are my files uploaded to your servers?
No. Tools on this site process files locally in your browser using JavaScript. Your files never leave your device.
How many tools does the site actually have?
85 tools across 12 categories, and counting — every one of them free, live today, and processed entirely in your browser. New tools ship regularly.
Which browsers are supported?
Any modern browser — Chrome, Edge, Firefox, or Safari, on desktop or mobile. Since processing happens locally, performance depends on your device.
How do you make money if it's free?
Through non-intrusive advertising. We don't sell user data — there isn't any to sell, since your files never reach our servers in the first place.
Will tools ever move behind a paywall?
No. Every tool that launches free stays free. That commitment doesn't change as we add more categories.
How do you decide what to build next?
By starting with the highest-demand, most broadly useful tools in each category, and by listening to tool requests from people using the site.
Can I request a tool or report a bug?
Yes — use the "Request a tool" links throughout the site. We read every submission when planning what to build next.
New tools ship regularly
We're building toward 1000s of tools across every category above. Bookmark this page and check back often — new categories launch as soon as they're genuinely ready, not a day before.
Guides & tutorials
Practical guides on PDFs, writing, and SEO — grounded in how the tools on this site actually work.
Is OCR Accurate? What Actually Affects It, and How to Get Better Results
Read moreWhy AI Coding Assistants Silently Block Your Vercel Deployments (And How to Fix It)
Read moreUTM Tagging Mistakes That Are Quietly Breaking Your Analytics
Read moreReady to get started? See what's live today.
No signup, no upload, no catch — just pick a tool and go.