About This Site
LittleOne Tools is a free online toolbox for general-purpose users. We run 200+ browser-side utilities — no accounts, no install, open and use. Aside from a few explicitly disclosed third-party calls (such as Have I Been Pwned for password breach checks), your inputs and outputs do not leave your browser.
Calculators Frequent calculators, unit conversion, and production math 71 tools PDF & Print Prep PDF page organization, conversion, and print preparation 23 tools Images & Digital Art Image processing, creator asset prep, and code graphics 33 tools Text & Writing Text cleanup, writing support, preview, and comparison 30 tools Privacy & Security Local cleanup, inspection, and share-safe preparation helpers 24 tools Developer & Data Structured data, parsing, encoding, and developer utilities 57 tools
🔥 Popular Tools
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PDF Merge
Merge multiple PDFs in a custom order with queue reordering, filename control, and local export.
QR Code Batch Generator
Generate multiple QR codes at once with batch download
Percentage Calculator
Calculate X% of Y, find percentage share, reverse a percent, and measure percentage change.
Image Crop & Resize
Drag to crop and resize by pixels or percent, with social and ecommerce presets and JPG, PNG, WebP export.
Word Counter
Count characters, words, sentences & paragraphs
JSON Formatter
Format, minify, and validate JSON, with TypeScript, Go, Java, Python, and C# code generation.
Date Calculator
Calculate date differences, date offsets, business-day offsets, and lookup ISO week, quarter, leap year, lunar, zodiac, and solar-term details.
PDF to Word
Extract readable text from text-based PDFs and generate a best-effort editable DOCX draft.
Image Compressor
Batch compress JPG, PNG, and WebP with target percentage, target size, and quality presets.
Markdown Preview
Live Markdown to HTML preview in your browser
EXIF Metadata Remover
Detect EXIF, XMP, IPTC and other metadata in one JPG/JPEG locally. Export a clean copy via lossless strip or Canvas redraw.
Base64 Encode/Decode
Encode and decode text with standard and URL-safe Base64, including UTF-8 and Unicode support.
How We Work
- Local computation by default. Aside from a few explicitly disclosed third-party calls, tool inputs and outputs are not uploaded by our tools.
- Honest framing. We do not overstate tool capabilities, fabricate credentials, or make "absolute" promises; if our copy ever drifts from the code reality, we update it.
- Sensitive tools have limits. Finance and health tools are educational estimates, not professional advice.
See About for the full set of principles and update cadence.
Tool Boundaries
The site includes calculators and self-checks for finance (loans, tax, investment, savings, refinance, etc. — 12 tools) and health (BMI, BMR, body-fat, TDEE, ovulation, due-date, color-vision — 7 tools). They are educational, formula-based estimates and do not replace a licensed professional's judgment. See the finance-specific and health-specific sections of the disclaimer.