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Save readable media links or local videos and extract WAV audio without installing an app.
Use a short clip or readable media file. Platform watch pages are unsupported; audio output is WAV.
Open tool：Save Media and Extract AudioMP4 → WAV
Browser-decodable clips, up to 120 seconds and 16 MiB.
Compare six fixed orientations for uniform grids using box and item dimensions.
Check items per layer, layer count and spacing before organizing or packing.
Open tool：Box Fit Calculator10×8×6 mm box, 3×2×2 mm item
40 items in the best uniform grid with rotation and no gap.
Plan cuts from equal-length stock using part lengths, quantities, end trim and gaps between parts.
Review each stock layout and model remainder before purchasing; the heuristic does not guarantee minimum stock.
Open tool：Cut Planner1000 mm stock, 600 + 400 mm parts
1 stock when kerf and end trim are both zero.
Calculate a file SHA-256 locally in your browser and compare a download or delivery checksum.
Choose one file, compare an expected hash, and copy or download the checksum without uploading the file.
Open tool：File SHA-256 ChecksumSHA-256 → 64 hexadecimal digits
Supports empty files and one file up to 128 MiB. A match is not a security scan.
Turn a list of item names and copy counts into labels for plain A4 or Letter paper.
Label storage boxes, event supplies or products; review the pages before printing and cutting.
Open tool：Item Label Printer15 names, A4 2×7
2 pages, with unused cells left blank.
Find a continuous same-day window when every participant is available.
Find a continuous same-day window when every participant is available.
Open tool：Meeting overlap60 minutes; A 09:00–12:00, B 10:00–11:30
Common window 10:00–11:30; latest start 10:30.
Calculate proportional print size, effective PPI and required pixels from image dimensions.
Compare your image with a chosen PPI target before printing, without uploading it.
Open tool：Image Print Size Calculator3000×2000 px at 254 mm wide
About 254×169.33 mm at 300 PPI.
Estimate packs to order and shortages before delivery from known usage and stock.
Prepare a household or workshop supply list using whole packs.
Open tool：Restock planner30 used in 30 days; 10 in stock; 12 per pack
7 delivery days, 30 coverage days and 3 reserve units: order 3 packs, 36 units.
Shift every SRT cue by a fixed duration and keep the subtitle text.
Shift every SRT cue by a fixed duration and keep the subtitle text.
Open tool：Subtitle time shift00:00:01,000–00:00:03,000, 1.5 seconds later
Becomes 00:00:02,500–00:00:04,500; text preserved.
Estimate pieces and boxes from net area, a chosen reserve and pieces per box.
Estimate pieces and boxes from net area, a chosen reserve and pieces per box.
Open tool：Tile quantity estimator12 m², 60×60 cm, 10% reserve, 4 per box
37 estimated pieces; buy 10 boxes with 40 pieces.
Rotate one duty per date in member order while respecting each person’s available weekdays.
Plan duties for a class, club or household and see unassigned dates and totals per member.
Open tool：Duty RosterMonday–Friday, A and B alternate
A available Mon/Wed/Fri and B Tue/Thu gives A/B/A/B/A. Dates with nobody available stay explicitly unassigned.
Use known scores, percentage weights and a target to find the weighted average needed on ungraded components.
Keep blank and zero scores distinct and see the earned contribution, required average or maximum possible grade.
Open tool：Grade Target Calculator80 on 40%, target 70
The remaining 60% needs a weighted average of 63.34. Check your school’s official grading rules.
Calculate segment start and end times from durations, then rebuild the schedule after changes.
Prepare a meeting or event run sheet with clear timing.
Open tool：Event TimelineStart 09:00; segments of 10, 35 and 10 minutes
End at 09:55, five minutes before a 10:00 target.
Allocate remaining pages across your chosen weekdays and check a daily page limit.
Replan after falling behind by updating progress and the start date.
Open tool：Reading Plan60 pages remaining across 5 reading days
Read 12 pages daily; a 10-page cap leaves a 10-page shortfall.
Compare subscriptions in one currency and estimate annual costs after a planned reduction.
See combined recurring costs without connecting accounts or canceling services.
Open tool：Subscription Budget100/month + 600/quarter + 1200/year
Annual cost 4800, monthly average 400; removing the quarterly item leaves 2400 per year.
Compare final cart totals before and after an extra purchase using your discount and shipping rules.
See whether buying extra for free shipping actually lowers the final payment.
Open tool：Discount and Free Shipping Check900 plus 80 shipping; add 100 for free shipping
Pay 980 originally or 1000 after adding items: 20 more.
Compare two line-based lists to find shared entries, differences and a merged list.
Reconcile rosters and task lists with explicit whitespace and case rules.
Open tool：List Comparison and MergeA: Alex, Blair; B: Blair, Casey
Shared: Blair. Merge: Alex, Blair, Casey.
Track packing items, quantities and weights against your own limit, with local backups.
Find unpacked items and known weight, with missing weights shown explicitly.
Open tool：Packing List and Weight CheckTwo 500g items plus one 200g item
Known weight is 1200g. Missing weights prevent an all-clear limit verdict.
Paste one person per line to create balanced groups while keeping duplicate names distinct.
Split a class or event roster, review every member, then copy the groups.
Open tool：Random Group Generator5 people into 2 groups
Group sizes are 3 and 2; each participant appears once.
Scale ingredient amounts to a new portion count while keeping units and to-taste items.
Adjust an ingredient list when cooking for more or fewer people.
Open tool：Recipe Portion Scaler4 to 6 portions; 300g rice
Use 450g rice. Cooking time and temperature are not inferred.
Split text by a custom Unicode code-point limit, preserving the source for per-chunk copying.
Prepare smaller text pieces for pasting without assuming a platform's counting rules.
Open tool：Text Chunking by LengthABCDE, with a limit of 2 code points
Produces AB, CD and E. Joining them preserves the original text.
Locally replace explicitly selected strings with a redaction marker, then review and copy or download.
Hide known text before sharing; this does not automatically detect all personal data.
Open tool：Custom Text RedactionAnna Ann; targets Anna and Ann
Produces [REDACTED] [REDACTED], preferring the longer match.
Compare package prices, sizes and pack counts on the same unit basis.
Compare different package sizes and multipacks to find the lowest unit price.
Open tool：Unit Price Comparison120 for 500g ×2 vs 150 for 1.5kg ×1
Per 100g: 12 versus 10. The second option has the lower unit price.
Enter work intervals and breaks to get daily and overall hours.
Add separate work intervals, handle overnight shifts and avoid counting overlaps twice.
Open tool：Work Hours Calculator09:00–12:00 plus 13:00–17:30
With no breaks: 7 hours 30 minutes, or 7.50 decimal hours.
Enter what each person paid to see who owes whom, with advanced bill splitting available.
Settle shared meals or trips: enter each person's payments, including 0, and get a transfer list.
Open tool：Bill Splitter & Settlement CalculatorAlice 900, Bob 300, Charlie 0
Each person owes 400. Bob pays Alice 100; Charlie pays Alice 400.
Inspect, edit, and selectively remove query parameters without opening the link.
Preserve untouched encoding and duplicate parameters while creating a URL to copy.
Open tool：URL Inspector & Query Editor?utm_source=demo&tag=A&tag=B
Remove utm_source while keeping both tag values in their original order.
Preview UTF-8 CSV in your browser, select columns, and export CSV or JSON.
Keep text values intact and confirm a protected copy when spreadsheet formula risks are detected.
Open tool：CSV Viewer and Column Export001 → 001
Leading zeros remain strings; protected copies modify formula-risk cells.
List options and criteria, set weights and benefit or cost directions, then compare weighted scores.
Review your trade-offs. Missing required scores or zero total weight prevent ranking.
Open tool：Weighted Decision Matrix2 options × 2 criteria
Scores reflect your inputs, not an objectively best answer.
Choose one static PNG or JPEG and reduce its dimensions while keeping proportions.
Set width, height or longest edge, then inspect and download PNG, JPEG or supported WebP output.
Open tool：Image Resizer and Export2400 × 1600 → 1200 × 800
Proportions stay locked without enlargement. Changed settings invalidate old results.
Check JSON syntax and duplicate keys, format or minify content, and preserve original number tokens.
Paste JSON to locate errors or get a formatted result.
Open tool：JSON Validator and Formatter9007199254740993
Large integers, negative zero and scientific notation keep their original spelling.
Compare two texts with added, removed and unchanged lines, including trailing empty lines.
Paste both versions to review changes or download a comparison report.
Open tool：Line-by-Line Text DiffA, B → B, A
Review removals and additions without automatic merging.
Arrange 2 to 8 colors, convert HEX, RGB and HSL, and check text and background contrast.
Edit opaque sRGB colors, review WCAG text contrast thresholds, then copy color codes or download CSS.
Open tool：Color Palette and Text Contrast#777777 / #FFFFFF → 4.48:1
Normal text AA fails; large text AA passes. Results apply only to these two colors.
Set 1 to 180 minutes and start, pause, or resume a focus session in your browser.
Keep the remaining time when you pause and resume when ready. No account or notification permission needed.
Open tool：Focus Timer25:00
Set 25 minutes for reading, then choose when to start your next session.
Trim line edges, remove empty or duplicate lines, and compare code points, lines and UTF-8 size.
Paste a list, choose your cleanup options, then copy the result or download a plain text file.
Open tool：Text Cleaner and CounterA, A, B → A, B
Removing duplicate lines keeps their first occurrence and remains case-sensitive.
Convert common units for length, area, mass, volume, and temperature.
Enter a value, choose both units, and read the result with its formula.
Open tool：Unit Converter1 m = 100 cm
One metre equals 100 centimetres.
Count days between Gregorian dates or add and subtract whole days from a date.
See the date difference alongside the count that includes both endpoints.
Open tool：Date Difference and Day Calculator2026-06-01 to 2026-06-10
9 days apart; 10 days including both dates.
Sorted by actual publication date.
This homepage is a directory. Calculations run in the browser on each tool page; the hosting service still processes the connection information needed to serve a page.
Calculations run in the browser on each tool page. This homepage does not collect your inputs; the website hosting service still processes technical information needed for connections.
No. Open a tool to enter your values and read the calculation rules on its page.