PDF Convert — Image to PDF
React Native

PDF Convert — Image to PDF

Image & Document to PDF Converter App

Overview

PDF Convert is a solo-built iOS utility that turns images and Office documents into PDFs and manages existing PDFs through six conversion tools. Rather than assembling PDFs on-device, it drives a cloud conversion engine (iLovePDF) through a Supabase Edge Function that keeps the API credentials off the client, then downloads and stores the finished file locally. It is localized in five languages and reports live progress at every step.

What It Does

Users choose a conversion, select images from the library or documents from the file picker, and the app uploads, converts and downloads the result while showing upload, processing and download progress. Finished PDFs can be shared or saved to the device through the native share sheet, and the last conversions are kept in a recent-files list that can be reopened, shared, or cleared.

Tech Stack

React NativeExpoTypeScriptexpo-document-pickerexpo-image-pickerexpo-sharingi18nAdMob
Download on theApp Store

Key Features

Six conversion tools: images to PDF, Word, Excel and PowerPoint to PDF, merge PDFs, and compress PDF

Combine up to twenty images into a single PDF in selection order

Photo-library picker for images and a MIME-filtered document picker for Office and PDF files

Share or save the finished PDF via the native share sheet (saved to Files/Downloads)

Recent-conversions history with reopen, share, per-item delete and clear-all

Step-by-step progress feedback across uploading, processing and downloading stages

Client-side file-size validation before upload

Five-language localization (English, Turkish, German, Spanish, French) with device-locale detection

Gallery

PDF Convert — Image to PDF screenshot 1PDF Convert — Image to PDF screenshot 2PDF Convert — Image to PDF screenshot 3PDF Convert — Image to PDF screenshot 4PDF Convert — Image to PDF screenshot 5

Technical Highlights

→React Native and Expo (Expo Router) on the New Architecture, written in TypeScript
→Cloud conversion via the iLovePDF REST API, brokered by a Supabase Edge Function (Deno) that holds the API keys server-side
→Multipart uploads and result downloads handled with axios and the modern expo-file-system File/Paths API
→expo-image-picker (multi-select) and expo-document-picker with per-tool MIME-type restrictions
→AdMob banner and frequency-capped interstitial ads that skip the first conversion and show on every second one
→i18next and expo-localization with persisted language selection across five locales
→Local history layer on AsyncStorage capped to the most recent conversions

Key Achievements

01

Designed, built and shipped the full app solo, from onboarding through App Store release (v1.2.0)

02

Architected a secure conversion pipeline that keeps third-party API keys server-side behind a Supabase Edge Function

03

Delivered six distinct conversion tools behind a single, consistent conversion flow with real-time progress

04

Shipped five-language localization and a monetization model combining banner and frequency-capped interstitial ads

Impact & Results

A self-published utility live on the App Store that makes converting photos and Office files to PDF, and merging or compressing PDFs, a quick, single-tap task on mobile.