All Koovlo tools in one searchable library

Browse PDF, image, education, document, and text tools with clearer category hubs, better internal links, and stronger long-tail search coverage.

Crawlable Tool Directory

Every category and tool is linked here in plain HTML so users and search engines can discover deeper pages faster.

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📄PDF Tools(18)

Privacy-first PDF utilities for merging, compressing, converting, signing, and organizing documents directly in your browser.

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PDF Merge

Combine multiple PDF files into a single document in your browser.

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Extract PDF Pages

Create a new PDF from selected pages or page ranges.

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Split PDF by Page Range

Split one PDF into multiple files using custom page ranges.

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Reorder PDF Pages

Rearrange, delete, and organize PDF pages visually.

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Rotate PDF Pages

Rotate all or selected PDF pages by 90, 180, or 270 degrees.

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Compress PDF

Reduce PDF file size for email, forms, and faster downloads.

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PDF to Image

Convert PDF pages to high-quality PNG or JPG images.

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Image to PDF

Convert JPG, PNG, and other images into a PDF document.

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PDF to Word

Convert PDF files into editable DOCX documents.

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Add Watermark to PDF

Add text or image watermarks to protect PDF files.

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PDF Page Numbers

Add customizable page numbers to one or more PDF pages.

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Duplicate PDF Pages

Create copies of selected pages inside a PDF document.

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Crop PDF Pages

Trim margins and crop visible page areas in a PDF.

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Change PDF Page Size

Resize PDF pages to A4, Letter, and custom dimensions.

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PDF Metadata

View and edit PDF properties like title, author, and subject.

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Grayscale PDF

Convert a colored PDF into black-and-white pages.

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Sign PDF

Add signatures, initials, dates, and text to PDF documents.

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Unlock PDF

Remove password protection from PDF files you are authorized to edit.

🖼️Image Tools(5)

Fast browser-based image tools for resizing, compression, format conversion, watermarking, and metadata cleanup.

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Resize Image

Resize images with presets, custom dimensions, and aspect ratio control.

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Compress Image

Reduce image size while balancing quality for the web or email.

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Convert Image

Convert between PNG, JPG, and WebP formats online.

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Add Watermark to Image

Add text or logo watermarks to photos and graphics.

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Strip Image Metadata

Remove EXIF metadata and location details from images.

🎓Education Tools(10)

Academic tools for students, colleges, and exam prep including GPA, CGPA, percentage, attendance, and revision planning.

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GPA Calculator

Calculate current GPA, credits, and target grade requirements.

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CGPA Calculator

Track cumulative GPA across multiple semesters and credits.

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Grade Calculator

Convert marks into grades with support for weighted subjects.

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Percentage Calculator

Calculate percentages, mark conversions, and quick academic ratios.

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Attendance Tracker

Track classes attended and calculate required future attendance.

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Flashcard Creator

Create and review digital flashcards by topic or subject.

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Quiz Generator

Build quick quizzes for revision, teaching, and practice tests.

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Notes Organizer

Sort study notes with categories, tags, and structure.

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Revision Planner

Plan revision schedules and track upcoming exams or goals.

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Rank Calculator

Estimate ranking and compare score performance quickly.

📋Document Tools(3)

Document workflow tools for building resumes, invoices, and PDF forms without complex desktop software.

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Resume Builder

Create ATS-friendly resumes and export them as PDF files.

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Invoice Generator

Generate professional invoices with totals, taxes, and PDF export.

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PDF Form Builder

Create fillable PDF forms with a drag-and-drop editor.

✍️Text and Web Tools(9)

Everyday utilities for word counts, formatting JSON, testing regex, encoding text, and other quick browser tasks.

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Word Counter

Count words, characters, paragraphs, and reading time instantly.

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Case Converter

Convert text into upper, lower, title, camel, or snake case.

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JSON Formatter

Format, validate, and minify JSON in one place.

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Base64 Encoder and Decoder

Encode or decode Base64 strings and text snippets online.

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URL Encoder and Decoder

Encode and decode URLs for web-safe strings and query values.

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Text to Speech

Turn written text into spoken audio with browser voices.

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Regex Tester

Test regular expressions with instant pattern matching feedback.

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Lorem Ipsum Generator

Generate placeholder text for designs, wireframes, and drafts.

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Text Summarizer

Summarize long text into shorter takeaways with browser-based processing.

Why choose Koovlo?

Fast, practical tools with a stronger focus on clarity and privacy.

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Fast workflows

Useful actions are easy to find, and tool interfaces avoid unnecessary friction.

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Privacy-aware processing

Many tasks run locally in the browser so users can work without sending files around.

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Student-friendly tools

Education pages provide room for long-tail use cases like GPA, CGPA, grades, and attendance.

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Mobile ready

Layouts scale down cleanly so users can finish quick tasks on any device.

Frequently asked questions

Quick answers that also help search engines understand the site structure.

Are all tools free to use?

Yes. Koovlo tools are free and available directly in your browser.

Do I need to create an account?

No signup is required. Open a tool and start using it right away.

Is my data safe?

Many tools process data locally in your browser for better privacy and faster results.

Can I use these tools on mobile?

Yes. The site is designed to work on phones, tablets, and desktops.