GitHub Sponsors
Open Collective
Google Open Source
Patreon
Liberapay
The Tidelift Subscription
Kubernetes
GitHub
Converterer
PDFShift
DocRaptor
pdflayer
HTMLEmail.io
PDFCrowd
Templates by Email Monster
Api2Pdf
Converterer (formerly Paperplane) is a REST API for file conversion and website capture, built for developers and no-code workflows.
File conversion: convert documents, spreadsheets, presentations, images, audio, and video across 300+ format pairs: DOCX to PDF, PDF to DOCX, XLSX to CSV, PNG to WebP, HEIC to JPG, MP4 to GIF, WAV to MP3, and hundreds more. Upload a file or pass a URL, and the converted file is delivered to built-in storage or your own bucket.
Website capture: render any URL as a pixel-perfect, print-ready PDF with a real headless Chromium engine, the same rendering path that has powered Paperplane since 2018. Page size, margins, headers and footers with page numbers, HTTP auth, and wait conditions for JavaScript-heavy pages are all parameters on a single call.
Built for developers: plain REST with curl-friendly endpoints, no SDK needed, just POST it. Code recipes for Python, Node.js, PHP, Laravel, Ruby, Go, Java, and plain cURL. Async jobs with signed (HMAC) webhooks, metadata passthrough, custom file names, and a synchronous capture endpoint when you want the PDF back in one request.
No-code and automation: drop conversion and capture into Zapier, Make, n8n, Power Automate, or Workato flows.
Storage your way: results land in the built-in destination with zero setup, or connect your own bucket (S3-compatible, Google Cloud Storage, Azure, and more).
Pricing: 100 free conversions a month, no credit card required, files up to 1 GB on every plan. Paid plans from $9.99/month including 2,500 conversions.
Formerly Paperplane (est. 2018): same team and infrastructure, expanded from HTML-to-PDF to full file conversion.
GitHub Sponsors ConvertererConverterer's answer:
Two APIs under one plan and one allowance: file conversion across 300+ format pairs (documents, spreadsheets, presentations, images, audio, video) and website capture that renders any URL as a print-ready PDF with a real headless Chromium engine. Pricing is flat per conversion, so a 900 MB video costs the same as a 40 KB document, where most competitors bill credits or processing minutes that scale with file size. And there is no SDK to install: it is plain REST you can drive from cURL.
Converterer's answer:
Predictable cost and less integration work. Flat per-conversion pricing with files up to 1 GB on every plan means no surprise bills when documents get heavy. The free tier is a real recurring allowance, 100 conversions every month with no card, rather than a one-time trial. Integration is one POST request with HTTP Basic auth, HMAC-signed webhooks instead of polling, and delivery straight into your own storage bucket if you want it. The capture engine has been rendering PDFs in production since 2018, and we publish sourced, dated comparisons against competitors on our own site, including the cases where they are the better fit.
Converterer's answer:
Developers adding file conversion or document rendering to their products (invoices, reports, archives, media processing), and operations or no-code builders automating the same jobs through Zapier, Make, n8n, Power Automate, or Workato. Typical users are SaaS teams generating documents at scale and teams replacing self-hosted conversion stacks they no longer want to operate.
Converterer's answer:
Converterer started in 2018 as Paperplane, a focused HTML-to-PDF API built on headless Chrome. Customers kept asking for conversions that had nothing to do with HTML: DOCX to PDF, HEIC to JPG, MP4 to GIF. So the platform grew past its name, and in May 2026 it relaunched as Converterer: the same team and rendering engine, expanded to a full file conversion API with 300+ format pairs alongside the original website capture.
Converterer's answer:
Website capture runs on a real headless Chromium engine, so output matches what desktop Chrome renders, including web fonts, Flexbox, Grid, and JavaScript-heavy pages. The API itself is plain REST over HTTPS with HTTP Basic authentication and HMAC-signed webhooks, and output delivery integrates with standard object storage (S3-compatible, Google Cloud Storage, Azure).
Based on our record, GitHub Sponsors seems to be more popular. It has been mentiond 143 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
This... exists? Did they even search for it? https://github.com/open-source/sponsors. - Source: Hacker News / 7 months ago
Community-Driven Upgrades: Increased integration of real-time community feedback via platforms such as GitHub Sponsors and social media channels (e.g., Twitter (@fsf)) could drive iterative improvements in the license. - Source: dev.to / about 1 year ago
Chad has been leading the Open Source Pledge, a simple framework to get companies to fund the projects they rely on. The idea is straightforward: for every developer your company employs, allocate $2,000 per year to open source. Distribute those funds however you wantโGitHub Sponsors, Open Collective, Thanks.dev, direct payments, etc. The only other ask is to publish a blog post showing what you did. - Source: dev.to / about 1 year ago
Abstract: This post dives into the evolution and global expansion of GitHub Sponsors and its impact on funding open-source projects. We examine its inception, supported countries, technical challenges, and how blockchain innovations and alternative funding models are shaping the future of open source development. From core benefits and practical use cases to potential hurdles and forward-looking trends, this... - Source: dev.to / about 1 year ago
This post explores the critical issue of sustainable funding for open source projects. We dive into historical challenges, innovative funding strategies, and future trends that aim to support the collaborative spirit of open source development. Using examples from corporate sponsorships, non-profit foundations, crowdfunding methods, subscription models, government grants, and commercialization, the article... - Source: dev.to / about 1 year ago
Open Collective - Recurring funding for groups.
PDFShift - Convert any HTML documents to high-fidelity PDF using a single POST request
Google Open Source - All of Googles open source projects under a single umbrella
DocRaptor - As the only API powered by the Prince HTML-to-PDF engine, DocRaptor provides the best support for complex PDFs with powerful support for headers, page breaks, page numbers, flexbox, watermarks, accessible PDFs, and much more
Patreon - Patreon enables fans to give ongoing support to their favorite creators.
pdflayer - Free, powerful HTML to PDF API supporting both URL and raw HTML conversion. Unlimited document size, lightning-fast and compatible PHP, Python, Ruby, etc.