OPEN
Choose your starting point.
Add a local file or choose your planning settings. Just exploring? Start with a built-in example.
Find a meeting timeYOUR EVERYDAY FILE TOOLKIT
Fix the file.
Finish the task.
An image that won’t upload. A table trapped in a PDF. Duplicate rows you can’t safely delete. Get a useful result, right in your browser.
- Free to use
- No account needed
- Files stay on your device in these workflows
NEW IN THE MUSIC WORKBENCH MIDI + AUDIO
Build an idea.
Keep what works.
Chords and melody in one private MIDI studio. Keep your favorite two bars, explore the rest and export editable notes. Or prepare a recording by BPM and bar count.
F MINOR / 124 BPMCHORDS + MELODY
4 or 8 bars · phrase locks · separate MIDI parts · sound off by default
CHOOSE THE JOB, NOT THE JARGON
Useful tools.
Clear outcomes.
Convert, organize, protect and prepare your files. See what each tool can do before you start.
EXACT SIZE · VERIFIED
Exact-Size Image Compressor
Meet a file-size ceiling, or lock exact pixel dimensions too. Frame the image, check actual bytes and download a verified result.
Custom dimensions + KB · crop or fit · localPDF TABLE · CHECKED XLSX
PDF Tables to Excel
See the original page, select a table region and review the extracted rows. Download Excel or CSV without uploading your PDF.
Visual selection · selectable text · no OCRNEW · CLEANER DATA
CSV Cleaner & Excel Export
Review duplicates and conflicting records, then choose, rename and reorder the columns you deliver. Preview the exact CSV, TSV or text-safe Excel export.
Column selection · leading zeros preserved in ExcelNEW · IMAGE FORMATS
Image Format Converter
Turn WebP, PNG and JPG files into the format you need. Choose transparency or a background, then download images together.
Up to 12 images · optional bounds · ZIPNEW · WORK & LIFE
Meeting Time Planner
Compare working-hour overlap across one day or the next seven days. Check local dates, choose a time and export a calendar event.
Daylight-saving aware · ranked days · ICSPRIVACY
Screenshot Redactor
Permanently replace selected pixels, re-decode the PNG and verify every redaction zone before sharing.
Sanitized PNG · zone proof · receiptQR
QR Code Maker
Create a link, text or WiFi QR. Preview it, run digital scan checks and download SVG or PNG.
SVG / PNG · real print test still neededPDF
Merge, Split & Organize PDFs
Combine files, keep only the pages you need, or split each page into a separate PDF. Preview the order before downloading.
PDF or ZIP · no upload · no accountIMAGE
Social Image Resizer
Protect the focal point while you crop, fit or resize for a publishing destination.
PNG / JPEG / WebP · localAUDIO
Audio Cutter
Keep the section you need or remove a selected range. Enter exact timecodes, review the output duration and download WAV.
Keep or remove · exact frame plan · localVERIFIED
JSON Formatter & Validator
Pinpoint syntax errors, format or minify JSON and export the current result with path and hash evidence.
JSON / path CSV · local verificationSCIENCE, MATH & MAKING
Understand the model.
Check the calculation.
Explore a formula, inspect a 3D model or prepare a simple part. These tools show their assumptions and limits; they do not certify a design or a real-world experiment.
MATH · MODELS & MAKING
Scale Calculator
Convert real and model dimensions, or recover an unknown scale from measured lengths and check a second reference.
Mixed units · measured ratios · clear formulasSCIENCE & 3D · INTERACTIVE LAB
Parametric 3D Designer
Make a washer, spacer or cup from millimeter dimensions. Inspect the model, solve a cup height from capacity and export STL.
Capacity solver · dimensioned STL · model inspectionSCIENCE & 3D · INTERACTIVE LAB
STL Viewer & Inspector
Measure a local STL, find open edges and resize it to your dimensions. Check a fixed-orientation build-volume fit before opening your slicer.
Local STL · dimensions · mesh diagnostics · resize · bed fitSCIENCE & 3D · INTERACTIVE LAB
Projectile Motion Calculator
Compare a vacuum trajectory with air resistance and wind. Inspect flight differences in 3D and export the sampled paths.
Air resistance · pinned flight comparison · trajectory CSVSCIENCE & 3D · INTERACTIVE LAB
Molecular Geometry Lab
Explore ten predefined molecules and their bond angles. See molar-mass contributions and convert grams to moles with worked steps.
Molar mass · grams ↔ moles · molecular geometrySCIENCE & 3D · INTERACTIVE LAB
Ideal Gas Law Calculator
Solve pressure, volume, moles or temperature with explicit units. Compare two states in a 3D piston and pressure–volume graph.
Solve pressure, volume, amount or temperature · 3D piston · P–V chartSCIENCE & 3D · INTERACTIVE LAB
3D Function Grapher
Plot z = f(x, y), inspect cross sections and gradients, and estimate signed or absolute double integrals. Export the sampled points.
Contours · directional derivative · integral · sections CSVSCIENCE & 3D · INTERACTIVE LAB
3D Vector Calculator
See vector sums, angles, dot and cross products, and projections. Calculate distance to the origin plane spanned by two vectors.
Dot & cross product · projection · plane distanceTHREE SIMPLE STEPS
Open. Adjust. Download.
No account to create and no software to install. Your browser does the work.
ADJUST
See what you are getting.
Adjust the settings that matter. Review the local times, cleaned rows or file preview before saving.
Clean a spreadsheetUSE IT
Take the useful result.
Download a finished file, copy a summary or share your plan. No email address or subscription required.
Organize your PDFsFIND YOUR TOOL
What are you working on?
Coordinate a meeting, clean a dataset or prepare a document. Everything is grouped by the job you need to do.
Work & life
Find a meeting timeClean up a CSVPlan a carry-on bagShare-ready assets
Create and check a QR codeTrim an audio clipBuild a sticker sheetImage delivery
Compress to exact KBResize & cropPermanently redactPDF & documents
Merge and organize PDFsExtract selected pagesSplit PDF pagesTurn a table into ExcelDeveloper & web
Format JSONPreview a search snippetCompare SARIFWHEN THE TASK NEEDS A LITTLE CONTEXT
Know what to check. Get a better result.
Practical walkthroughs for the tricky parts: choosing the right input, spotting a bad result and knowing when a different approach is needed.
Documents & privacy
Turn a PDF table into an Excel sheetSelectable text, row checks and common failuresRemove private information from a screenshotWhy replacing pixels is different from hiding a layerCheck subtitle timing and readabilityOverlapping cues, pacing and what needs human reviewWebsites & email
Review search titles and descriptionsPreview metadata without promising a Google resultCheck redirects before moving a websiteFind missing destinations and ambiguous matchesMake sense of DMARC email reportsSeparate authentication failures from next actionsData & development
Find overlap in training and test dataCheck leakage before relying on an evaluation scoreReview new security-scan findingsCompare reports against an explicit release policySee reproducible tests and known limits
Our labs use disclosed synthetic examples. They demonstrate specific tool behavior, not independent certification or a promise about every input.
BUILT FOR YOUR PRIVACY
Your files.
Your device.
The image and PDF workflows featured here run locally. Your file contents are not sent to FastTool. Each tool explains its supported formats and limits.
How your privacy is protectedNo account required
Open a tool and start working immediately.
A preview before download
Check the image, rows or page order before saving.
Clear limits up front
Supported formats, file sizes and browser requirements are listed on each tool.
FAST ANSWERS
Before you drop a file.
Is FastTool free?
The public tools featured here are free to try and do not require an account. A page states any file, size or browser limit before export.
Are my files uploaded?
Featured local workflows use browser file APIs and do not include a file-upload path. Ordinary page assets and consent-controlled analytics may still make network requests; every tool states its exact boundary.
Can I compress an image to 100 KB?
Yes. Open the 100 KB image compressor, choose an image and check the result. It searches for a file below your limit and shows the actual size. Very small limits can require lower quality or fewer pixels.
Does PDF to Excel work on scanned documents?
No. The PDF table extractor reads selectable text, not photographs of pages. You can review detected rows before downloading XLSX or CSV.