Tool Categories

FlexyPdf groups its 112 tools into 13 categories so you can find what you need without scrolling through an undifferentiated list. Each category below covers a coherent set of related tasks — a quick description of what the category is for, who uses it, and which tools live inside.

The categorization reflects how people actually use the site rather than how the underlying code is organized. PDF tools cover document-level operations on PDF files; Image tools handle raster and vector image work; Converters translate between data formats like CSV, JSON, YAML, and Base64; Developer Tools are the formatters, validators, and editors that come up during programming work; SEO Tools help with on-page search optimization; Text Tools manipulate prose and code-friendly strings; Calculators cover finance, health, and everyday math; Generators produce useful artefacts like QR codes, passwords, and certificates; Audio & Video handles media conversion and trimming; AI Tools are task-specific AI utilities that mostly run client-side; Web Tools are network and HTTP utilities; Design Tools cover colour, typography, and accessibility; and Compilers are sandboxed code runners. Browse the cards below for the full description of each category.

PDF Tools

10 tools

Browser-based PDF tools that handle merging, splitting, compressing, converting, watermarking, password protection, and full annotation editing — without uploading your documents to a server.

Explore PDF Tools

Image Tools

12 tools

Compress, resize, convert, crop, remove backgrounds, and enhance images in the browser. Bulk operations are supported and originals never leave your device.

Explore Image Tools

Converters

15 tools

Convert between common data formats: CSV, JSON, YAML, XML, Base64, hex colours, and Unicode encodings. Useful for cleaning up data dumps and moving between system formats.

Explore Converters

Developer Tools

12 tools

JSON, XML, and HTML formatters and validators; regex tester; code beautifiers and minifiers; encoders, and a live HTML/CSS/JS code editor. Built for the small tasks that interrupt your real work.

Explore Developer Tools

SEO Tools

7 tools

Practical SEO utilities: title and meta tag analyzers with live SERP previews, keyword density and suggestion tools, sitemap and robots.txt generators, readability scoring.

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Text Tools

11 tools

Count words, check grammar and readability, change case, remove duplicates, detect anagrams and palindromes, and perform encoding and Unicode operations on text.

Explore Text Tools

Calculators

7 tools

Financial calculators (EMI, tax, GST, tip, currency), health calculators (BMI, age), and everyday math tools. Each result includes the formula used so you can verify the calculation.

Explore Calculators

Generators

13 tools

Generate QR codes, passwords, barcodes, lorem ipsum, certificates, invoices, business cards, random numbers, hashtags, and other useful artefacts — instantly and offline-capable.

Explore Generators

Audio & Video

6 tools

Audio and video utilities: MP4-to-MP3 extraction, video-to-GIF conversion, audio and video trimming, GIF compression, MP3 normalization. Powered by FFmpeg.wasm in the browser.

Explore Audio & Video

AI Tools

3 tools

AI-assisted tools for summarization, paraphrasing, grammar correction, alt-text generation, prompt scaffolding, and content adaptation. Most run locally on bundled small models.

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Web Tools

7 tools

Web infrastructure utilities: SSL checker, DNS lookup, WHOIS lookup, IP geolocation, website speed test, mobile-friendly test, sitemap generator, robots.txt generator.

Explore Web Tools

Design Tools

5 tools

Visual design utilities: colour picker and palette generator, gradient builder, contrast checker, colourblind simulator, font preview. Built around accessibility and quick iteration.

Explore Design Tools

Compiler

4 tools

Run Python, JavaScript, C++, and SQL code in sandboxed environments. Useful for testing snippets, learning, prototyping algorithms, and explaining code without setting up a local environment.

Explore Compiler

How the categories are maintained

New tools are added to the most natural category for their primary use, even when they could arguably fit in two. For example, a barcode generator could live in either Generators or Image Tools; we put it in Generators because the user is starting from a parameter (the barcode value) rather than from an existing image. When a tool genuinely spans two categories — like the image-to-ASCII converter — the category page for the secondary category links to it as a related tool rather than duplicating the entry.

Categories themselves are added rarely. The current set has grown organically as tools accumulated, and the threshold for a new category is roughly five distinct tools that share a workflow but do not fit comfortably under an existing label. If you find yourself navigating here to look for a tool that does not exist yet, the contact page is the best way to suggest it.