CatConvert

All Tools

81 tools available, organized by category

🖼️

Image Tools

(14)

Image Compressor

FreeLocal

Reduce JPG, PNG, and WebP file size with quality and target-size controls.

Image Format Converter

FreeLocal

Convert images between PNG, JPG, WebP, GIF, BMP, and AVIF formats.

Image Cropper

FreeLocal

Crop images freely or with preset ratios for avatars, covers, and social posts.

Image Resizer

FreeLocal

Resize one image or batch-normalize multiple images with common platform presets.

Image Base64 Converter

FreeLocal

Convert images to Base64 strings or restore Base64 data back to image files.

Image Watermark Tool

FreeServer

Add visible text or image watermarks to uploaded images.

Invisible Watermark

FreeServer

Embed a hidden watermark in an image for lightweight ownership tracking.

Invisible Watermark Detector

FreeServer

Extract and check hidden watermark data from supported images.

Background Remover

FreeLocal

Remove image backgrounds locally with the lightweight u2netp ONNX model and export transparent PNG files.

ID Photo Background Changer

FreeLocal

Cut out a portrait locally and compose common ID photo background colors and sizes.

Image OCR

FreeAI

Extract text from images with OCR processing.

EXIF Viewer and Cleaner

FreeLocal

View or remove image metadata such as camera, lens, and location fields.

SVG to PNG/JPG Converter

FreeLocal

Convert SVG vector graphics into PNG or JPG bitmap files.

Image Collage Maker

FreeLocal

Join multiple images into a long image or grid collage.

📄

PDF Tools

(15)

PDF Visual Editor

FreeLocal

Preview a PDF locally, add text, images, signatures, highlights, cover rectangles, and page edits, then export a new PDF.

PDF to Image

FreeServer

Convert each PDF page into PNG or JPG images.

Image to PDF

FreeServer

Merge JPG, PNG, and WebP images into a single PDF file.

PDF Merger

FreeServer

Combine multiple PDF files into one document in your chosen order.

PDF Splitter

FreeServer

Split a PDF by page range or export selected pages as separate files.

PDF Compressor

FreeServer

Reduce PDF file size for email, uploads, and archiving.

PDF Page Rotator

FreeServer

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

PDF Page Extractor

FreeServer

Extract selected pages or page ranges from a PDF into a new PDF file.

PDF Page Number Tool

FreeServer

Add page numbers to PDF files with configurable position, format, and font size.

PDF Encryptor

FreeServer

Protect a PDF with an open password for safer sharing and archiving.

PDF Decryptor

FreeServer

Remove password protection from PDF files when you know the correct password.

PDF OCR

FreeAI

Recognize text from scanned PDF pages and export the result as a TXT file.

PDF Delete Pages

FreeLocal

Remove selected pages from a PDF locally in your browser and export a new PDF.

PDF Reorder Pages

FreeLocal

Rearrange PDF pages locally in your browser and export a new PDF.

PDF Watermark

FreeLocal

Add text watermarks to a PDF locally in your browser and export a new PDF.

🔄

Document Conversion

(8)

Word to PDF

FreeServer

Convert DOC and DOCX documents into PDF files.

PDF to Word

FreeServer

Convert PDF files into editable Word documents where possible.

Excel to PDF

FreeServer

Convert XLS and XLSX spreadsheets into PDF files.

Excel to Image

FreeServer

Convert Excel sheets into PNG images.

PowerPoint to PDF

FreeServer

Convert PPT and PPTX presentations into PDF files.

PowerPoint to Image

FreeServer

Convert each presentation slide into a PNG image.

Word to Image

FreeServer

Convert Word document pages into PNG images.

Spreadsheet Merge and Split

FreeLocal

Merge or split CSV and TSV spreadsheet data locally in your browser.

🔎

Smart Extraction

(3)

Invoice and Receipt OCR

FreeAI

Extract invoice or receipt fields, line items, confidence labels, validation reports, and Excel/CSV/JSON exports.

Image to Text and Table

FreeServer

Extract text and editable table data from screenshots or images, then export structured results.

手写体识别

FreeAI

识别手写笔记、表单和白板内容,保留换行并提示逐行核对

🎬

Video Tools

(4)

Video Compressor

FreeServer

Compress videos with quality, resolution, and target-size presets.

Video Converter

FreeServer

Convert videos between MP4, WebM, MOV, AVI, and other common formats.

Video to GIF

FreeServer

Convert a selected video segment into an animated GIF.

Extract Audio from Video

FreeServer

Extract the audio track from a video and save it as an audio file.

🎵

Audio Tools

(4)

Audio Converter

FreeServer

Convert audio between MP3, WAV, FLAC, AAC, and OGG formats.

Audio Compressor

FreeServer

Reduce audio file size by adjusting bitrate and encoding settings.

Audio Trimmer

FreeServer

Cut an audio file to a specific start and end time.

Audio Merger

FreeServer

Join multiple audio files into one continuous audio track.

🧭

Diagram conversion

(2)

Mind Map Converter

FreeServer

Upload XMind, FreeMind, OPML, Markdown, or text files and export the mind map as PDF, PNG, or SVG.

Flowchart Converter

FreeServer

Upload Draw.io, Visio, Gliffy, mxGraph, Mermaid, or text files and export the diagram as PDF, PNG, or SVG.

📝

Markdown

(4)

Markdown Preview

FreeLocal

Preview Markdown in real time, switch themes, generate a TOC, and export output.

Markdown to HTML

FreeLocal

Convert Markdown content into a complete HTML file.

Markdown 转 PDF

FreeServer

将 Markdown 导出为带样式 PDF

HTML to Markdown

FreeLocal

Convert HTML snippets or pages into clean Markdown.

Developer Tools

(9)

JSON Formatter

FreeLocal

Format, minify, validate, view, and compare JSON data.

Regex Tester

FreeLocal

Test regular expressions with live matches, groups, templates, and replacement output.

Timestamp Converter

FreeLocal

Convert Unix timestamps to readable dates and calculate timezone/date differences.

URL Encoder and Decoder

FreeLocal

Encode, decode, parse, and build URLs and query strings.

Hash Generator

FreeLocal

Calculate MD5, SHA-1, SHA-256, and SHA-512 hashes for text and files.

Favicon Generator

FreeLocal

Generate full-size website favicons and app icons from one image.

UUID and Password Generator

FreeLocal

Generate UUID values and random secure passwords.

JWT Decoder

FreeLocal

Decode JWT headers and payloads and inspect token expiration details.

XML and YAML Formatter

FreeLocal

Format XML and convert structured data into readable YAML output.

📱

QR Code Tools

(4)

QR Code Generator

FreeLocal

Create QR codes for URLs, text, Wi-Fi, vCard, and location data.

QR Code Decoder

FreeLocal

Upload an image and decode the QR code content inside it.

Barcode Generator

FreeLocal

Generate EAN, UPC, Code128, and printable barcode labels.

批量二维码生成

FreeServer

批量生成多个二维码

✏️

Text Tools

(9)

Word Counter

FreeLocal

Count words, characters, lines, paragraphs, reading time, and keyword density.

Text Deduplicator

FreeLocal

Remove duplicate lines, find near duplicates, and export a cleanup report.

Case Converter

FreeLocal

Convert text and variable names between upper, lower, camel, snake, and kebab case.

Color Converter

FreeLocal

Convert HEX, RGB, and HSL colors and generate palettes, gradients, and contrast checks.

Table Screenshot Maker

FreeLocal

Render pasted table data into a polished PNG screenshot locally in your browser.

Table to Markdown/HTML

FreeLocal

Convert table data into Markdown tables or HTML table markup.

Batch Text Replace

FreeLocal

Find, replace, and compare text in bulk.

Data Masking Tool

FreeLocal

Detect and mask phone numbers, email addresses, ID-like strings, and sensitive text.

Text Cleaner

FreeLocal

Remove extra spaces, blank lines, mojibake-like clutter, and formatting noise.

🔒

File Security

(4)

PDF 元数据清除

FreeLocal

清除 PDF 文件元数据信息

文件哈希校验

FreeLocal

计算文件 MD5/SHA256 哈希值

Batch File Renamer

FreeLocal

Rename multiple files locally with rules, preview conflicts, and download a ZIP.

图片元数据清除

FreeLocal

批量清除图片 EXIF 等元数据

✍️

E-Signature

(1)

E-Signature Image Maker

FreeLocal

Draw and export a handwritten signature image.