# RUNTIME-HUB

> RUNTIME-HUB by RuntimeZero is a directory of focused browser tools for PDF and document tasks, image and media work, creative workflows, browser-based AI, audio, random number generation, wheel-based picks, and developer utilities.

RUNTIME-HUB helps visitors choose a dedicated tool and move from input to result with fewer unnecessary steps. The hub itself is a directory, not one uniform application: features, formats, requirements, and processing behaviour vary by tool. Use the canonical main-domain URLs below; legacy tool-subdomain URLs may redirect, but new links should prefer these paths.

Some workflows process supported content locally in the browser. Some tools may download application code, libraries, fonts, or AI model assets before use. Do not assume every tool is entirely offline, that every operation stays on-device, or that AI-assisted outputs are definitive. Check the individual tool for its supported formats and limitations.

## Main pages and site information

- [RUNTIME-HUB homepage](https://runtime-hub.com/): Browse the tool library by category and read the product principles and FAQs.
- [Guides library](https://runtime-hub.com/guides/): Practical task-oriented guides, organized by PDF, images, video, browser AI, audio, and developer utilities.
- [About RUNTIME-HUB](https://runtime-hub.com/about.html): Mission, product principles, categories, and information about browser-based workflows.
- [Contact](https://runtime-hub.com/contact.html): Submit suggestions, request features, report bugs, or discuss collaborations; the page links to the RuntimeHub Reddit community.
- [Privacy Policy](https://runtime-hub.com/privacy.html): Website-level privacy information and notes about external resources and the linked tools.
- [Terms of Service](https://runtime-hub.com/terms.html): General terms, responsible use, availability, and output limitations.
- [XML sitemap](https://runtime-hub.com/sitemap.xml): Sitemap of the homepage, tool routes, guide articles, and public information pages.
- [robots.txt](https://runtime-hub.com/robots.txt): Public crawler directives.
- [Reddit community](https://www.reddit.com/r/RuntimeHubWebStudios/): Share tool ideas, request features, report issues, and follow community discussion.

## Guides by tool

- [Pic2PDF guide](https://runtime-hub.com/guides/pic2pdf/): Learn how to turn JPG, PNG and WebP images into a PDF, organise page order, check page settings and preview the result before saving.
- [SplitPDF guide](https://runtime-hub.com/guides/splitpdf/): A practical guide to splitting PDF files into individual pages or selected ranges, checking page numbering and exporting only the pages you need.
- [MergePDF guide](https://runtime-hub.com/guides/mergepdf/): Learn to combine multiple PDF documents in a deliberate order, check orientation and page count, and verify the merged file before sharing it.
- [Zippy guide](https://runtime-hub.com/guides/zippy/): Learn how to prepare document and image files in a focused browser workflow, verify previews and choose the right output for sharing.
- [SignIt guide](https://runtime-hub.com/guides/signit/): Learn how to place a handwritten signature on a PDF, align it with the intended signature area and check the exported document.
- [CV-Go-Fast guide](https://runtime-hub.com/guides/cv/): Practical advice for structuring a readable CV, choosing concise achievement-focused wording, checking layout and exporting a PDF with CV-Go-Fast.
- [Compressy guide](https://runtime-hub.com/guides/compressy/): Learn how resolution, format and quality settings affect image, GIF and short-video file size, and how to inspect the compressed output.
- [Clipr guide](https://runtime-hub.com/guides/clipr/): Learn a practical workflow for trimming short videos, checking start and end points, keeping the important frames and reviewing the exported clip.
- [SwitchPic guide](https://runtime-hub.com/guides/switchpic/): Understand when to choose JPG, PNG or WebP, what format conversion does and how to inspect the converted image for transparency and quality changes.
- [Squeezy guide](https://runtime-hub.com/guides/squeezy/): A guide to reducing JPG, PNG and WebP image file sizes using a preview-led workflow while preserving details important to the final use.
- [Favicoo guide](https://runtime-hub.com/guides/favicoo/): Learn how to prepare a simple favicon source, choose an appropriate mark and check favicon sizes and browser display after export.
- [HeyC! HEIC guide](https://runtime-hub.com/guides/heic/): Learn when to convert HEIC photos, how to choose JPG or PNG output and what to check when preparing iPhone images for websites, documents or older apps.
- [Purify guide](https://runtime-hub.com/guides/purify/): Understand EXIF and other image metadata, when removing metadata can help privacy, and how to verify cleaned files before sharing them.
- [PhotoLux guide](https://runtime-hub.com/guides/photolux/): A detailed guide to browser-based photo editing, including tonal adjustments, filters, denoise, sharpening, retouching, brushes and layer-based workflows where supported.
- [RotatePic guide](https://runtime-hub.com/guides/rotatepic/): Learn the difference between rotating an image and flipping it horizontally or vertically, and verify the saved output before using it.
- [GraffitiQ guide](https://runtime-hub.com/guides/graffitiq/): Learn how typography, colour, contrast, shine and depth work together in a holographic-style digital card, and how to check the exported design at real size.
- [SoloBG guide](https://runtime-hub.com/guides/solobg/): Learn how to evaluate portrait background removal around hair, shoulders, clothing and transparent edges, then export a useful cutout.
- [PixelBoost guide](https://runtime-hub.com/guides/pixelboost/): Understand image upscaling, native resolution, AI-generated detail and common artifacts, then choose a sensible enlargement and inspect the result.
- [PixelTruth guide](https://runtime-hub.com/guides/pixeltruth/): Learn to treat AI-image detection as an evidence review: consider model limitations, image context, provenance and why a detector cannot prove authorship.
- [LexyAI guide](https://runtime-hub.com/guides/lexyai/): Learn what AI-writing pattern tools can and cannot tell you, why false positives happen, and how to review text fairly and responsibly.
- [Lexiconic guide](https://runtime-hub.com/guides/lexiconic/): Practical advice for transcribing interviews, voice notes and recordings, including audio quality, speaker clarity, punctuation review and corrections.
- [Scribeus guide](https://runtime-hub.com/guides/scribeus/): Learn how to prepare text for text-to-speech, improve pronunciation and punctuation, choose an appropriate voice and check the rendered audio.
- [Sonic guide](https://runtime-hub.com/guides/sonic/): Understand audio formats, bitrate, compatibility and loudness considerations when converting supported audio files in a browser workflow.
- [Ringtonz guide](https://runtime-hub.com/guides/ringtonz/): Learn to choose a recognisable audio moment, trim it cleanly, check the beginning and ending, and save a ringtone that works on your phone.
- [Regexx guide](https://runtime-hub.com/guides/regexx/): Learn to build regular expressions incrementally, test matches on sample text, inspect capture groups and preview replacements before using a pattern in code.
- [LeanCSV guide](https://runtime-hub.com/guides/leancsv/): Learn to normalise whitespace and case, remove empty rows, detect column types and deduplicate CSV data while checking that meaningful values are preserved.
- [JSONify guide](https://runtime-hub.com/guides/jsonify/): Learn to read JSON structure, locate common syntax errors, format nested objects and verify arrays, strings and data types before using JSON in an application.
- [QRGenie guide](https://runtime-hub.com/guides/qrgenie/): Learn how to choose the right QR payload, test the code with a phone camera, keep quiet zones clear and export a usable QR image.
- [Wordy guide](https://runtime-hub.com/guides/wordy/): Learn how to use keyword counts as one writing signal, improve search-intent coverage and keep website copy helpful, readable and natural.

## Tool directory

### PDF and documents

- [Pic2PDF](https://runtime-hub.com/pic2pdf/): Learn how to turn JPG, PNG and WebP images into a PDF, organise page order, check page settings and preview the result before saving.
- [SplitPDF](https://runtime-hub.com/splitpdf/): A practical guide to splitting PDF files into individual pages or selected ranges, checking page numbering and exporting only the pages you need.
- [MergePDF](https://runtime-hub.com/mergepdf/): Learn to combine multiple PDF documents in a deliberate order, check orientation and page count, and verify the merged file before sharing it.
- [Zippy](https://runtime-hub.com/zippy/): Learn how to prepare document and image files in a focused browser workflow, verify previews and choose the right output for sharing.
- [SignIt](https://runtime-hub.com/signit/): Learn how to place a handwritten signature on a PDF, align it with the intended signature area and check the exported document.
- [CV-Go-Fast](https://runtime-hub.com/cv/): Practical advice for structuring a readable CV, choosing concise achievement-focused wording, checking layout and exporting a PDF with CV-Go-Fast.

### Images and media

- [Compressy](https://runtime-hub.com/compressy/): Learn how resolution, format and quality settings affect image, GIF and short-video file size, and how to inspect the compressed output.
- [Clipr](https://runtime-hub.com/clipr/): Learn a practical workflow for trimming short videos, checking start and end points, keeping the important frames and reviewing the exported clip.
- [SwitchPic](https://runtime-hub.com/switchpic/): Understand when to choose JPG, PNG or WebP, what format conversion does and how to inspect the converted image for transparency and quality changes.
- [Squeezy](https://runtime-hub.com/squeezy/): A guide to reducing JPG, PNG and WebP image file sizes using a preview-led workflow while preserving details important to the final use.
- [Favicoo](https://runtime-hub.com/favicoo/): Learn how to prepare a simple favicon source, choose an appropriate mark and check favicon sizes and browser display after export.
- [HeyC! HEIC](https://runtime-hub.com/heic/): Learn when to convert HEIC photos, how to choose JPG or PNG output and what to check when preparing iPhone images for websites, documents or older apps.
- [Purify](https://runtime-hub.com/purify/): Understand EXIF and other image metadata, when removing metadata can help privacy, and how to verify cleaned files before sharing them.
- [PhotoLux](https://runtime-hub.com/photolux/): A detailed guide to browser-based photo editing, including tonal adjustments, filters, denoise, sharpening, retouching, brushes and layer-based workflows where supported.
- [RotatePic](https://runtime-hub.com/rotatepic/): Learn the difference between rotating an image and flipping it horizontally or vertically, and verify the saved output before using it.

### AI and creative studios

- [GraffitiQ](https://runtime-hub.com/graffitiq/): Learn how typography, colour, contrast, shine and depth work together in a holographic-style digital card, and how to check the exported design at real size.
- [SoloBG](https://runtime-hub.com/solobg/): Learn how to evaluate portrait background removal around hair, shoulders, clothing and transparent edges, then export a useful cutout.
- [PixelBoost](https://runtime-hub.com/pixelboost/): Understand image upscaling, native resolution, AI-generated detail and common artifacts, then choose a sensible enlargement and inspect the result.
- [PixelTruth](https://runtime-hub.com/pixeltruth/): Learn to treat AI-image detection as an evidence review: consider model limitations, image context, provenance and why a detector cannot prove authorship.
- [LexyAI](https://runtime-hub.com/lexyai/): Learn what AI-writing pattern tools can and cannot tell you, why false positives happen, and how to review text fairly and responsibly.
- [Lexiconic](https://runtime-hub.com/lexiconic/): Practical advice for transcribing interviews, voice notes and recordings, including audio quality, speaker clarity, punctuation review and corrections.
- [Scribeus](https://runtime-hub.com/scribeus/): Learn how to prepare text for text-to-speech, improve pronunciation and punctuation, choose an appropriate voice and check the rendered audio.

### Audio tools

- [Sonic](https://runtime-hub.com/sonic/): Understand audio formats, bitrate, compatibility and loudness considerations when converting supported audio files in a browser workflow.
- [Ringtonz](https://runtime-hub.com/ringtonz/): Learn to choose a recognisable audio moment, trim it cleanly, check the beginning and ending, and save a ringtone that works on your phone.

### Randomizer engines

- [Numbr](https://runtime-hub.com/numbr/): Generate random numbers within a chosen range for casual games, number selection, classroom activities, simulations, and everyday decisions.
- [LuckyWheel](https://runtime-hub.com/luckywheel/): Spin a customizable wheel of names, actions, colors, numbers, or places for game-night choices, team picks, informal giveaways, and group decisions.

### Web and developer utilities

- [Regexx](https://runtime-hub.com/regexx/): Learn to build regular expressions incrementally, test matches on sample text, inspect capture groups and preview replacements before using a pattern in code.
- [LeanCSV](https://runtime-hub.com/leancsv/): Learn to normalise whitespace and case, remove empty rows, detect column types and deduplicate CSV data while checking that meaningful values are preserved.
- [JSONify](https://runtime-hub.com/jsonify/): Learn to read JSON structure, locate common syntax errors, format nested objects and verify arrays, strings and data types before using JSON in an application.
- [QRGenie](https://runtime-hub.com/qrgenie/): Learn how to choose the right QR payload, test the code with a phone camera, keep quiet zones clear and export a usable QR image.
- [Wordy](https://runtime-hub.com/wordy/): Learn how to use keyword counts as one writing signal, improve search-intent coverage and keep website copy helpful, readable and natural.