All tools — 2,792 free online tools

Browse all 2,792 AltFTool tools by category — converters, PDF and image editors, calculators, developer utilities and generators. Search by name or task; every tool opens free in your browser with no account and no paid tier.

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Percentage Calculator

Calculate percentages, percentage change, increase, decrease, and ratios instantly.

VerifiedFinance & Business

Open

Age Calculator

Calculates age based on birthdate

AI Tools

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BMI Calculator

Calculate your Body Mass Index

VerifiedHealth & Fitness

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Loan EMI Calculator

Loan EMI Calculator helps you calculate the monthly EMI of a loan.

VerifiedFinance & Business

Open

SIP Calculator

Estimate SIP maturity value, invested amount, and wealth gain with annual step-up.

VerifiedFinance & Business

Open

GST Calculator

Calculate inclusive or exclusive GST with CGST, SGST, and IGST breakdowns.

VerifiedFinance & Business

Open

Image Resizer

Resize images with custom dimensions, social media presets, fit/crop modes, batch processing, and format export.

VerifiedDesign & Color

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Image Compressor

Compress images instantly and reduce file size efficiently.

VerifiedImage & VideoDesign & Color

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Image Cropper

Crop your image according to your needs

VerifiedDesign & Color

Open

PDF Merger Tool

Merge multiple PDF files quickly into a single document.

VerifiedPDF & Documents

Open

PDF Split Tool

Split PDFs by page, fixed batches, custom ranges, extraction, or page removal with browser-side ZIP/PDF export.

VerifiedPDF & DocumentsFinance & Business

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Unit Converter

Convert 71 units across length, weight, temperature, area, volume, speed, data and time.

VerifiedDeveloperLifestyle

Open

CSV to JSON

Convert CSV file or text into JSON format

VerifiedDeveloper

Open

JSON Editor

Validate, format, minify, and convert JSON snippets.

VerifiedDeveloper

Open

Regex Tester

Test and validate regular expressions instantly with live results.

VerifiedDeveloperAI Tools

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JWT Decoder

Decode JWT header and payload claims instantly in the browser.

VerifiedDeveloper

Open

UUID Generator

Generate secure unique UUIDs instantly for any application.

VerifiedDeveloper

Open

AI Passport Photo Maker

Crop a photo to official passport and visa sizes with published head-height guides, then lay out a print sheet.

VerifiedImage & Video

Open

Password Generator

Generate random, highly secure passwords with advanced character controls, live strength scoring, and entropy estimates. Everything runs in your browser — nothing is stored.

VerifiedSecurity & Privacy

Open