Pocketful
中文版

Free Online File Converters

Convert PDFs, images, archives and structured text without installing desktop software. Pocketful converters run in the browser and keep supported files on your device. Move between practical formats such as CSV and JSON, turn PDF pages into images, or extract an archive for a one-off task. Each converter explains its supported input and output before you download the result.

Popular tasks

Workflows

All Converters

Table Screenshot → Markdown
Paste a table screenshot, get Markdown table syntax. Local OCR, supports Chinese & English tables.
Image to Text (OCR)
Extract editable text from screenshots & photos. Local OCR, Chinese & English, no upload.
Merge PDF
Combine multiple PDFs into one, reorder freely. Local processing, no watermarks.
Split PDF
Extract a page range like 1-3,5 from any PDF. In-browser, files stay private.
Rotate PDF
Turn pages 90°, 180° or 270°, all pages or a range like 1-3,5. In-browser, no upload.
CSV ↔ JSON Converter
Two-way CSV/JSON conversion. Handles quoted cells & line breaks correctly.
ZIP Files
Compress or extract ZIP archives in-browser. No artificial limits; bounded by browser memory.
Color Converter
HEX ↔ RGB ↔ HSL with live swatch & picker, CSS-ready copy.
Unit Converter
Length, weight & temperature conversions. Metric ↔ imperial, fully local.
Image ↔ Base64
Convert images to Base64 data URLs and preview Base64 back to images.
PDF ↔ Images
Export PDF pages to PNG or combine images into a PDF. pdf.js + pdf-lib, local.
Compress PDF
Shrink PDFs in the browser. Quality & resolution sliders, no upload.
JSON ↔ YAML
Two-way JSON/YAML conversion in the browser. Copy or download.
Contrast Checker
Find the most readable text color for any background. WCAG AA/AAA ratios, black/white pick + same-hue suggestions.

Why use Pocketful converters

These converters focus on clear input and output instead of storing your files in a cloud workspace. They are free for quick browser tasks, require no account and link naturally to the next useful step.