Everyday Utility Tools, Zero Telemetry.
High-performance calculators, unit converters, and media optimizers running directly and privately inside your browser memory.
EPUB File Validator
Validate EPUB eBooks against IDPF & W3C specifications. Detect XML syntax errors, broken links, missing assets, and store compliance issues.
DOCX to EPUB Converter
Convert Microsoft Word (.docx) documents into clean, valid EPUB ebooks with automatic chapter splitting and navigation TOC.
EPUB to DOCX Converter
Convert EPUB ebooks to editable Microsoft Word (.docx) documents with preserved headings, formatting, and chapters.
EPUB to PDF Converter
Converts EPUB ↔ PDF for quick proofing, sharing, or internal workflow handoffs.
Amazon Book Description Generator
AI tool that creates structured, conversion-focused Amazon book descriptions ready for KDP listings.
Pen Name Generator
Generates author pen-name options aligned with genre, audience, and branding style using AI.
Book Title Generator
AI-powered tool that generates market-aware book title and subtitle ideas by genre and tone.
Self-Publishing Income Calculator
Projects royalties, monthly/annual income, and break-even timing based on sales and cost assumptions.
Book Cover Template Generator
Generates full-wrap print-ready cover dimensions with exact spine, bleed, and safe zones for KDP, IngramSpark, and Lulu. Includes visual preview and PDF download.
PDF Master
Merge, extract, rotate, compress, annotate with stamps & watermarks, and convert PDFs to images or Word .docx documents 100% in your browser.
QR Code Generator
Generate clean, scannable QR codes for website URLs and plain text.
Book Price Optimizer
Models ebook and paperback pricing to balance royalties, margins, and reader expectations.
About ToolSlash Engine
ToolSlash is a high-performance utility platform engineered for speed, privacy, and efficiency. Our core engine powers a wide array of everyday tools - from quick converters to sophisticated text and media processors. By running complex algorithms directly in your browser, we eliminate server round-trips to deliver a seamless, lightning-fast experience.
Frequently Asked Questions
- Are the utilities free?
- Yes, all utility tools on the ToolSlash platform are 100% free to use. There are no premium tiers, hidden fees, or paywalls.
- How is data processed?
- We strongly prioritize client-side processing. Most of our tools execute entirely within your browser memory for maximum speed and zero data exposure.
- Is my data saved?
- While some computationally heavy tools may require our backend engine, your files and data are never saved, stored, or analyzed by us.