PDF Split & Merge Tool

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Visit the application URL\n2. Choose between Split or Merge mode\n3. Upload your PDF file(s)\n4. Configure split ranges or merge order\n5. Download the processed PDF\n\n## Technology Stack\n\n- **Backend**: Hono (TypeScript)\n- **Frontend**: React 18.2.0 with TypeScript\n- **PDF Processing**: PDF-lib library\n- **Styling**: TailwindCSS\n- **Storage**: Client-side file handling (no server storage)","label",[135],"3de9008a-3ccf-11f0-ac45-9e149126039e","shared","5fdcc53d-2e72-460f-96c7-a6242d5172e5",2,["D",1748552124295],[145],"565cd6c8-3ccf-11f0-9526-9e149126039e",["D",1748552165324],[28],"514c0604-3ccf-11f0-bfcc-9e149126039e","backend","e65c4410-c56d-4760-b917-995716232a21",3,["D",1748552156824],[154],"pulls","branches","forks","envVars",{"_166":66,"_168":66},"connections",{"_166":66,"_167":66},"count","unfilledCount","emptyCount",{"_47":153,"_32":154,"_30":155,"_137":-5,"_39":40,"_38":156,"_139":62,"_36":204,"_13":66,"_33":34,"_35":-5,"_24":25,"_142":-5,"_177":205,"_27":206},{"_47":198,"_32":199,"_30":60,"_137":155,"_39":40,"_38":156,"_139":25,"_36":200,"_13":66,"_33":184,"_35":201,"_24":25,"_142":-5,"_177":202,"_27":203},{"_47":150,"_32":28,"_30":31,"_137":-5,"_39":40,"_38":14,"_139":62,"_36":195,"_13":66,"_33":34,"_35":-5,"_24":25,"_142":-5,"_177":196,"_27":197},{"_47":191,"_32":44,"_30":43,"_137":31,"_39":40,"_38":14,"_139":25,"_36":192,"_13":66,"_33":21,"_35":45,"_24":25,"_142":-5,"_177":193,"_27":194},{"_47":144,"_32":145,"_30":146,"_137":-5,"_39":40,"_38":147,"_139":62,"_36":188,"_13":66,"_33":34,"_35":-5,"_24":25,"_142":-5,"_177":189,"_27":190},{"_47":180,"_32":181,"_30":182,"_137":146,"_39":40,"_38":147,"_139":62,"_36":183,"_13":66,"_33":184,"_35":185,"_24":25,"_142":-5,"_177":186,"_27":187},{"_47":134,"_32":135,"_30":136,"_137":-5,"_39":40,"_38":138,"_139":62,"_36":176,"_13":66,"_33":21,"_35":141,"_24":25,"_142":-5,"_177":178,"_27":179},["D",1748552119012],"children",[],[135],"3de8fb08-3ccf-11f0-ac45-9e149126039e","types.ts","3de8fb9e-3ccf-11f0-ac45-9e149126039e",["D",1748552124295],"script","// Shared types for PDF operations\n\nexport interface SplitRequest {\n file: string; // base64 encoded PDF\n pages: string; // e.g., \"1-3,5,7-9\"\n filename: string;\n}\n\nexport interface MergeRequest {\n files: Array<{\n data: string; // base64 encoded PDF\n filename: string;\n }>;\n outputFilename: string;\n}\n\nexport interface ApiResponse {\n success: boolean;\n data?: string; // base64 encoded result PDF\n filename?: string;\n error?: string;\n}\n\nexport interface PdfInfo {\n pageCount: number;\n filename: string;\n size: number;\n}",[],[145,181],["D",1748552124295],[174],[145],"565ccea8-3ccf-11f0-9526-9e149126039e",["D",1748552165324],[],[28,44],["D",1748552165324],[172],[28],"514bf4b6-3ccf-11f0-bfcc-9e149126039e","index.ts",["D",1748552156824],"import { Hono } from \"https://esm.sh/hono@3.11.7\";\nimport { PDFDocument } from \"https://esm.sh/pdf-lib@1.17.1\";\nimport { readFile, serveFile } from \"https://esm.town/v/std/utils@85-main/index.ts\";\nimport type { SplitRequest, MergeRequest, ApiResponse } from \"../shared/types.ts\";\n\nconst app = new Hono();\n\n// Unwrap Hono errors to see original error details\napp.onError((err, c) => {\n throw err;\n});\n\n// Serve frontend assets\napp.get(\"/frontend/*\", c => serveFile(c.req.path, import.meta.url));\napp.get(\"/shared/*\", c => serveFile(c.req.path, import.meta.url));\n\n// Serve main application\napp.get(\"/\", async c => {\n const html = await readFile(\"/frontend/index.html\", import.meta.url);\n return c.html(html);\n});\n\n// Helper function to parse page ranges\nfunction parsePageRanges(pagesStr: string, totalPages: number): number[] {\n const pages: number[] = [];\n const ranges = pagesStr.split(',').map(s => s.trim());\n \n for (const range of ranges) {\n if (range.includes('-')) {\n const [start, end] = range.split('-').map(s => parseInt(s.trim()));\n if (isNaN(start) || isNaN(end) || start < 1 || end > totalPages || start > end) {\n throw new Error(`Invalid page range: ${range}`);\n }\n for (let i = start; i <= end; i++) {\n if (!pages.includes(i)) pages.push(i);\n }\n } else {\n const page = parseInt(range);\n if (isNaN(page) || page < 1 || page > totalPages) {\n throw new Error(`Invalid page number: ${range}`);\n }\n if (!pages.includes(page)) pages.push(page);\n }\n }\n \n return pages.sort((a, b) => a - b);\n}\n\n// Split PDF endpoint\napp.post(\"/api/split\", async c => {\n try {\n const body: SplitRequest = await c.req.json();\n \n // Decode base64 PDF\n const pdfBytes = Uint8Array.from(atob(body.file), c => c.charCodeAt(0));\n \n // Load the PDF\n const pdfDoc = await PDFDocument.load(pdfBytes);\n const totalPages = pdfDoc.getPageCount();\n \n // Parse page ranges\n const pagesToExtract = parsePageRanges(body.pages, totalPages);\n \n // Create new PDF with selected pages\n const newPdfDoc = await PDFDocument.create();\n \n for (const pageNum of pagesToExtract) {\n const [copiedPage] = await newPdfDoc.copyPages(pdfDoc, [pageNum - 1]); // PDF-lib uses 0-based indexing\n newPdfDoc.addPage(copiedPage);\n }\n \n // Generate output filename\n const baseName = body.filename.replace(/\\.pdf$/i, '');\n const outputFilename = `${baseName}_split.pdf`;\n \n // Save the new PDF\n const newPdfBytes = await newPdfDoc.save();\n const base64Result = btoa(String.fromCharCode(...newPdfBytes));\n \n const response: ApiResponse = {\n success: true,\n data: base64Result,\n filename: outputFilename\n };\n \n return c.json(response);\n } catch (error) {\n const response: ApiResponse = {\n success: false,\n error: error instanceof Error ? error.message : 'Unknown error occurred'\n };\n return c.json(response, 400);\n }\n});\n\n// Merge PDF endpoint\napp.post(\"/api/merge\", async c => {\n try {\n const body: MergeRequest = await c.req.json();\n \n if (!body.files || body.files.length === 0) {\n throw new Error('No files provided for merging');\n }\n \n // Create new PDF document\n const mergedPdf = await PDFDocument.create();\n \n // Process each file\n for (const file of body.files) {\n // Decode base64 PDF\n const pdfBytes = Uint8Array.from(atob(file.data), c => c.charCodeAt(0));\n \n // Load the PDF\n const pdfDoc = await PDFDocument.load(pdfBytes);\n \n // Copy all pages from this PDF\n const pageIndices = Array.from({ length: pdfDoc.getPageCount() }, (_, i) => i);\n const copiedPages = await mergedPdf.copyPages(pdfDoc, pageIndices);\n \n // Add all copied pages\n copiedPages.forEach(page => mergedPdf.addPage(page));\n }\n \n // Save the merged PDF\n const mergedPdfBytes = await mergedPdf.save();\n const base64Result = btoa(String.fromCharCode(...mergedPdfBytes));\n \n const response: ApiResponse = {\n success: true,\n data: base64Result,\n filename: body.outputFilename || 'merged.pdf'\n };\n \n return c.json(response);\n } catch (error) {\n const response: ApiResponse = {\n success: false,\n error: error instanceof Error ? error.message : 'Unknown error occurred'\n };\n return c.json(response, 400);\n }\n});\n\n// Health check endpoint\napp.get(\"/api/health\", c => {\n return c.json({ status: \"ok\", timestamp: new Date().toISOString() });\n});\n\nexport default app.fetch;",[],[154,199],["D",1748552156824],[170],[154],["D",1748552067308],{"_100":99,"_107":103},{"_100":99,"_101":-5,"_102":103,"_18":58,"_104":105,"_106":25},{"_13":89,"_32":90,"_47":40,"_91":48,"_92":-5,"_93":-5,"_94":-5,"_95":-5,"_96":-5,"_97":49,"_98":99},"ctx",{"_82":-5,"_127":244,"_245":246,"_247":248,"_249":25,"_250":25,"_251":25,"_252":62,"_253":-5,"_254":-7,"_255":-7,"_256":66,"_257":25,"_258":25,"_259":-5,"_260":25,"_261":25,"_262":25,"_263":-5},"ENV",{"_215":216,"_217":218,"_219":90,"_220":221,"_222":223,"_224":225,"_226":227,"_228":229,"_230":231,"_232":233,"_234":235,"_236":237,"_238":239,"_240":241,"_242":243},"REACT_APP_SENTRY_DSN","https://586020d86f05489db63a554690acf1e9@o1398359.ingest.sentry.io/6724499","RENDER_GIT_COMMIT","e8c4b7030cb7600e4eb0736b15f422c8b8bd130f","RENDER_GIT_BRANCH","POSTHOG_API_TOKEN","phc_nmoyuAkStEZuUp69rYlg1DZgrIt19Gx0Y4Hwf8tGgJP","POSTHOG_API_HOST","https://wart.val.town","WEB_API_TEMPLATE","https://{val}.web.val.run","APP_URL","https://www.val.town","MODULE_URL","https://esm.town","VANITY_WEB_API_TEMPLATE","https://{label}.val.run/","DENOLS_URL","https://lsp.val.town","NODE_ENV","production","CLOUDFLARE_TURNSTILE_SITE_KEY","0x4AAAAAACtaIZJH7s9rBMZ6","GOOGLE_CLIENT_ID","875989696899-jtsqkhlbdv5jrlsk8631p7ipjg3c6o62.apps.googleusercontent.com","STRIPE_PUBLISHABLE_KEY","pk_live_51N2zvWEpZTTLipIkVEwXrUG9AT0yeOOEYxszarZT1jpsZV58Ly6wlg3SltZpHN26CUalOBmUSY7adQRQiSkCZz2500qSXNkf8Y","API_URL","https://api.val.town",[],"preferencesKeybindings","default","preferencesTheme","light","preferencesFixers","preferencesCopilot","preferencesSelectionAi","preferencesCloseBrackets","preferencesChatPanelState","preferencesDprint","preferencesDenofmt","notificationCount","flagDenols","isBusinessOrgMember","businessOrgHandle","isBusinessOrgAdmin","isHigherTownieTier","navCollapsed","currentOrgId"]

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